release: 0.3.0 persistent history, configurable openers, and dev info panel

- Lower Python requirement to >=3.8 for broader compatibility
- Update version to 0.1.1
- Add classifiers for better PyPI discoverability
- Fix description to match cd-browser functionality

CHANGELOG.md

@@ -4,16 +4,87 @@ All notable changes to this project will be documented in this file.
 
 The format is based on Keep a Changelog, and this project follows Semantic Versioning.
 
-## [1.0.0] - 2026-03-14
+## [0.3.0] - 2026-04-06
 
 ### Added
-- Initial release of the Python AI Dev Template
+- Two-line compact header with live session state: version, history count, filter state, hidden/files toggles, and development summary
-- Universal Python project structure using `src/`
+- Persistent history storage between sessions with configurable state path and bounded history size
-- `pyproject.toml`-based project configuration
+- History list rendering in most-recent-first order
-- Development tooling with `black`, `ruff`, `mypy`, and `pytest`
+- History filter mode (`/` inside history) with dedicated query and navigation behavior
-- `pre-commit` integration
+- Development info panel (`i`) with git context, detected stack, and suggested commands
-- `Makefile` with development, quality, and diagnostic commands
+- Configurable open-with menu order via `config.toml`:
-- `instructions-agent.md` for AI coding agent guidance
+  - `open_with.files`
-- `.env.example` for environment-based configuration
+  - `open_with.directories`
-- README with setup, workflow, and template reuse instructions
+- Automatic creation of opener config template when `config.toml` is missing
-- MIT license
+- New `opencode` opener support for directory actions
+
+### Improved
+- Filter label highlighting now works consistently in both tree and history filter modes
+- UI color behavior is now explicitly normalized to avoid terminal color bleeding
+- History selection and filtering logic aligned with reversed (most-recent-first) history rendering
+
+## [0.2.6] - 2026-04-04
+
+### Added
+- Incremental filter workflow (`/`) with contextual Enter behavior:
+  - Directories navigate in-place
+  - Files open the app menu
+- File visibility toggle (`a`) to switch between directories-only and mixed view
+- Open-with app menu (`o`) with arrow-key selection (`↑`/`↓`, `Enter`, `Esc`)
+- New opener support for `nano`, `less`, and `bat` for file actions
+- Blocking terminal app execution with UI state restore after exit
+
+### Improved
+- Open-with options are now context-aware (GUI/headless, file/directory) and only shown when executables are available
+- Better handling of paths containing spaces when launching openers
+- Extended README with full controls reference and platform compatibility guidance
+
+## [0.2.5] - 2026-04-03
+
+### Improved
+- Add explicit repository link in README for PyPI users to access the full demo and documentation
+
+## [0.2.4] - 2026-04-03
+
+### Fixed
+- Use absolute demo GIF URL in README so image renders correctly on PyPI
+
+## [0.2.3] - 2026-04-02
+
+### Added
+- Add project demo GIF at `docs/demo.gif`
+- Show GIF demo in README
+
+## [0.2.2] - 2026-04-02
+
+### Fixed
+- Include `cd_browser_post_install.py` in wheel/sdist so `cd_browser_post_install` works after `pip install`
+
+## [0.2.1] - 2026-04-02
+
+### Fixed
+- Prevent crashes when scanning directories with restricted permissions
+- Handle non-interactive post-install runs without failing on EOF
+- Fix shell reload message interpolation in post-install output
+
+### Improved
+- Make post-install shell integration idempotent (avoid duplicate `cd_()` entries)
+- Add test coverage for permission errors and post-install flows
+- Update default application name to `cd-browser`
+
+## [0.2.0] - 2026-04-02
+
+### Added
+- Interactive post-install script (`cd_browser_post_install`) for automatic shell integration
+- Option to automatically add `cd_()` function to ~/.bashrc or ~/.zshrc during installation
+- Improved uninstall instructions in README
+
+### Improved
+- Installation UX: clearer setup process with user prompts
+- Shell integration: better guidance for enabling `cd_` command
+
+### Added
+- Initial release of **cd-browser**
+- Terminal-based directory navigation
+- Interactive directory tree navigation
+- History navigation mode

README.md

@@ -1,46 +1,151 @@
 # cd-browser
 
-`cd-browser` is a terminal-native directory navigator for fast filesystem browsing from the command line.
+**Stop typing paths. Browse them.**
 
-It provides an interactive interface for exploring directories with the keyboard and returns the selected path at the end of the session so shell wrappers can change the current shell directory.
+`cd-browser` is a fast keyboard-driven directory navigator for the terminal.
+It lets you explore directory trees visually and jump to any folder instantly.
 
+![cd-browser demo](https://gitea.sakydogalo.es/saky/cd-browser/raw/branch/main/docs/demo.gif)
+
+Repository (full demo + docs): https://gitea.sakydogalo.es/saky/cd-browser
+
+## Why cd-browser?
+
+Working in the terminal often means:
+
+- typing long directory paths
+- navigating deep folder trees
+- repeating `cd ..` multiple times
+
+`cd-browser` provides an **interactive terminal UI** that allows you to browse directories with the keyboard and return the selected path directly to your shell.
+
+## Features
+
+- ⌨️ Fully keyboard-driven workflow (`↑` / `↓` / `←` / `→`)
+- 🌲 Expand and collapse directories (`→` to expand/enter, `←` to collapse/back)
+- 📜 Persistent history between sessions (`h` history mode, `b` back, `f` forward)
+- 🔎 Incremental filter mode (`/`, type to filter, `Backspace`, `Esc`)
+- 🧭 History filter mode (`/` inside history) with most-recent-first ordering
+- 📄 Toggle file visibility (`a`) to switch between directories-only and mixed view
+- ⚡ Fast jumps in large lists (`PgUp`/`PgDn`, `Home`/`End`, `g`/`G` in normal mode)
+- 🚀 Contextual `open with` menu (`o`) with app detection based on your environment
+- 🔁 Blocking terminal editors restore the UI state when they exit (`nvim`, `nano`, `less`, `bat`)
+- 🧩 Configurable app menu via `config.toml` with automatic template creation
+- 🛠 Development snapshot in header + detailed info panel (`i`)
+- 👀 Toggle hidden entries with `.`
+- 🖥 Native terminal interface
+- 🔁 Works with Bash, Zsh and other shells
+- ⚡ Returns the selected path to the shell (`Enter` to confirm, `Esc` to cancel)
+
+## Controls
+
+Normal mode:
+
+- `↑` / `↓`: Move selection
+- `→`: Expand directory, or enter when already expanded
+- `←`: Collapse directory, or go to parent
+- `Enter`: Confirm selected path and exit
+- `Esc`: Cancel and return the original path
+- `h`: Toggle history mode
+- `b` / `f`: Back / forward in navigation history
+- `.`: Toggle hidden entries
+- `a`: Toggle file visibility
+- `/`: Enter filter mode
+- `o`: Open selected entry with an app
+- `i`: Toggle development info panel
+- `PgUp` / `PgDn`: Page jump
+- `Home` / `End`: Jump to first/last entry
+- `g` / `G`: Jump to first/last entry
+
+Filter mode:
+
+- Type text: Filter visible entries in real time (case-insensitive)
+- `↑` / `↓`: Move inside filtered results
+- `Enter`: Apply filter and perform contextual action:
+  - Directory: navigate into it without exiting `cd_`
+  - File: open app selection menu
+- `Esc`: Exit filter mode and clear query
+- `Backspace`: Remove last filter character
+
+History mode:
+
+- `↑` / `↓`: Move through history entries (most recent at top)
+- `Enter`: Jump to selected history path
+- `Esc` or `h`: Exit history mode
+- `PgUp` / `PgDn`, `Home` / `End`: Fast history navigation
+- `/`: Enter history filter mode
+
+History filter mode:
+
+- Type text: Filter history entries in real time (case-insensitive)
+- `↑` / `↓`: Move inside filtered history results
+- `Enter`: Jump to selected history path
+- `Esc`: Exit history filter mode and clear query
+- `Backspace`: Remove last filter character
+
+Open with menu (`o`):
+
+- `↑` / `↓`: Move between app options
+- `Enter`: Launch selected app
+- `Esc`: Cancel
+
+The menu only shows apps available in your system (`PATH`) and context:
+
+- GUI options (when GUI is available): `code`, system `open`/`xdg-open`
+- Terminal options: `antigravity`, `opencode`, `nvim`, `nano`, `less`, `bat` (as applicable)
+
+## Opener Configuration
+
+`cd-browser` reads opener settings from:
+
+- macOS/Linux: `~/.config/cd-browser/config.toml`
+- Windows: `%APPDATA%/cd-browser/config.toml`
+
+If the file does not exist, `cd-browser` creates it automatically with defaults.
+
+Example:
+
+```toml
+[open_with]
+files = ["code", "open", "antigravity", "nvim", "nano", "less", "bat"]
+directories = ["code", "opencode", "antigravity", "nvim"]
+```
+
+You can reorder or remove entries to customize app priority.
+
+## Quick Demo
+
+Run:
+
+```bash
+cd_
+```
+
+Browse directories using the arrow keys and press **Enter** to jump directly to the selected folder.
 
 ## Documentation
 
 See the documentation index:
 
+```
 docs/index.md
-
+```
-## Features
-
-- Interactive terminal directory browser
-- Keyboard-driven navigation
-- Parent directory entry via `..`
-- Expand and collapse directory trees
-- Session navigation history support in the application state
-- Installable CLI command: `cd_browser`
 
 ## Installation
 
 Install the project in user mode:
 
 ```bash
-pip install .
+pip install cd-browser
 ```
 
-For editable local development:
+**Important**: After installation, run this to set up the `cd_` command:
 
 ```bash
-pip install -e '.[dev]'
+cd_browser_post_install
 ```
 
-After installation, the application command is:
+This interactive script will guide you through enabling `cd_` in your shell.
-
-```bash
-cd_browser
-```
-
-When the interactive session exits, the program prints the final selected directory path.
 
 ## Shell Integration For `cd_`
 
@@ -77,6 +182,15 @@ Then use:
 cd_
 ```
 
+- Inside `cd_browser`, press `.` to toggle hidden entries.
+
+## Platform Compatibility
+
+Practical conclusion:
+
+- Best current support: **macOS and Linux**
+- **Windows is partially supported**, but still needs real-world validation in Windows terminal environments before being considered fully supported
+
 ## Uninstall
 
 If the project was installed with `pip`, remove it with:
@@ -85,7 +199,7 @@ If the project was installed with `pip`, remove it with:
 pip uninstall cd-browser
 ```
 
-If you also added the `cd_` shell wrapper, remove that function from your shell profile and reload the shell configuration.
+**Important**: After uninstalling, remove the `cd_()` function from your shell profile (~/.bashrc or ~/.zshrc) to clean up completely.
 
 ## Developer Setup
 

docs/ai-execution-log.md

@@ -0,0 +1,219 @@
+    
+# AI Execution Log
+
+This file stores the **full execution traces** of AI-assisted tasks.
+
+Unlike:
+- `docs/ai-worklog.md` → concise technical task summaries
+- `docs/ai-prompts.md` → concise prompt summaries
+
+this file preserves the **complete operational record** of an AI session.
+
+The purpose of this file is to make it possible to reconstruct:
+- the exact prompt given to the agent
+- the execution plan or todo list generated by the agent
+- the final execution report returned by the agent
+
+This file is intended for **full traceability** of AI-assisted development.
+
+Entries must be appended in chronological order.
+
+---
+
+## Standard Entry Structure
+
+Each execution entry should follow this structure:
+
+```md
+## BUILD-YYYYMMDD-XXX
+
+Date: YYYY-MM-DD HH:MM  
+Agent: OpenCode  
+Task Type: BUILD
+
+---
+
+### Prompt Provided to Agent
+
+<full prompt text>
+
+---
+
+### Agent Todos
+
+# Todos
+[ ] item 1
+[ ] item 2
+
+---
+
+### Agent Execution Report
+
+<final report returned by the agent>
+```
+
+For plan tasks, use:
+
+```md
+## PLAN-YYYYMMDD-XXX
+
+Date: YYYY-MM-DD HH:MM  
+Agent: OpenCode  
+Task Type: PLAN
+```
+
+---
+
+## Logging Rules
+
+When a significant AI task is executed, this file should record:
+
+1. The prompt that was actually given to the agent.
+2. The todo or execution plan shown by the agent.
+3. The final summary or execution report returned by the agent.
+
+Do not store private chain-of-thought.
+Only store user-visible execution artifacts.
+
+---
+
+## Relationship With Other Logs
+
+- `docs/ai-prompts.md` stores a concise summary of the prompt.
+- `docs/ai-worklog.md` stores a concise technical summary of what was done.
+- `docs/ai-execution-log.md` stores the complete visible execution trace.
+
+Together, the three files provide:
+
+1. Prompt intent
+2. Technical result
+3. Full execution trace
+
+---
+
+## First Use
+
+The next significant OpenCode task should append the first real execution entry to this file using the structure above.
+
+---
+
+## BUILD-20260316-005
+
+Date: 2026-03-16 02:51  
+Agent: OpenCode  
+Task Type: BUILD
+
+---
+
+### Prompt Provided to Agent
+
+Task Type:
+BUILD
+
+Task ID:
+BUILD-20260316-005
+
+Date:
+2026-03-16 02:51
+
+Objective:
+Finalize AI logging framework and repository workflow updates
+
+Context:
+The repository contains pending changes related to the AI logging framework, execution logging, and AI task workflow. These changes introduce a three-level logging system (`ai-worklog.md`, `ai-prompts.md`, and `ai-execution-log.md`), improved agent workflow rules, and enhancements to the `scripts/ai-task` tooling. The goal of this task is to validate these changes, ensure logs are consistent, and publish the finalized framework.
+
+Scope:
+- instructions-agent.md
+- AGENT_WORKFLOW.md
+- AI_TASK_TEMPLATE.md
+- scripts/ai-task
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+- docs/ai-execution-log.md
+
+Requirements:
+1. Inspect the current working tree and confirm the changes in scope.
+2. Verify that the AI logging framework is consistent across:
+   - instructions-agent.md
+   - AGENT_WORKFLOW.md
+   - AI_TASK_TEMPLATE.md
+   - scripts/ai-task
+3. Ensure that `scripts/ai-task` supports the three logging files:
+   - docs/ai-worklog.md
+   - docs/ai-prompts.md
+   - docs/ai-execution-log.md
+4. Append a new AI BUILD ENTRY to `docs/ai-worklog.md`.
+5. Append a new BUILD PROMPT ENTRY to `docs/ai-prompts.md`.
+6. Append a new execution entry to `docs/ai-execution-log.md` containing:
+   - the full prompt
+   - the agent todos
+   - the final execution report
+7. Ensure all three logs remain in chronological order.
+8. Stage all modified files within the defined scope.
+9. Create a single commit describing the finalized AI workflow and logging framework.
+10. Push the commit to the current branch.
+
+Constraints:
+- follow AGENT_WORKFLOW.md
+- keep scope limited to the files listed above
+- preserve existing project behavior unless explicitly changed
+- logs must be written before creating the commit
+- logs must be included in the same commit
+
+Testing:
+- run `make fix`
+- run `make quality`
+- verify that `scripts/ai-task` still generates a valid BUILD task prompt
+- verify that log files remain chronologically ordered
+
+Validation:
+make fix
+make quality
+
+Logging requirements:
+- append entry to docs/ai-worklog.md
+- append entry to docs/ai-prompts.md
+- include Date, Task ID, Agent, Scope
+- use Task ID: BUILD-20260316-005
+- maintain chronological Task ID order in ai-worklog.md, ai-prompts.md and ai-execution-log.md
+- append entry to docs/ai-execution-log.md
+
+Execution Logging requirements:
+- append entry to docs/ai-execution-log.md
+- include:
+  - full prompt
+  - agent todos
+  - final execution report
+- use the standard execution log format defined in docs/ai-execution-log.md
+
+Git requirements:
+- create a single commit
+- include all updated logs in the commit
+- push the commit to the current branch
+
+Expected Report:
+- files committed
+- commit hash
+- validation results
+- confirmation that logs were updated before commit
+- confirmation that push succeeded
+
+---
+
+### Agent Todos
+
+# Todos
+[x] Inspect scoped files and current logging framework changes
+[x] Update worklog, prompt log, and execution log for BUILD-20260316-005
+[x] Validate `scripts/ai-task` output and run `make fix` and `make quality`
+[x] Stage scoped files, create single commit, and push branch
+
+---
+
+### Agent Execution Report
+
+- Verified that `instructions-agent.md`, `AGENT_WORKFLOW.md`, `AI_TASK_TEMPLATE.md`, and `scripts/ai-task` describe the same three-level logging workflow.
+- Updated the task template and logs so the worklog, prompt log, and execution log stay aligned and chronological.
+- Confirmed `scripts/ai-task build "test task" src/app/ui.py` still produces a valid BUILD task prompt that references all three logs.
+- Ran `make fix` and `make quality` successfully before commit creation.
+- Prepared the scoped files for a single commit and push covering the finalized AI workflow and logging framework.

docs/ai-prompts.md

@@ -0,0 +1,221 @@
+# AI Prompts Log
+
+This file stores the prompts that triggered significant AI-driven development tasks.
+
+The goal is to preserve traceability between:
+- the prompt given to the AI
+- the scope of the change
+- the resulting work recorded in `ai-worklog.md`
+
+Each entry must include:
+- Date (YYYY-MM-DD HH:MM)
+- Task ID
+- Agent
+- Task type (plan/build)
+- Scope
+- Prompt summary
+- Result summary
+
+Only record prompts that:
+- change architecture
+- introduce new behavior
+- modify important logic
+- affect project structure
+- debug complex issues
+
+Do not store chain-of-thought reasoning. Only store the prompt intent and a concise result summary.
+
+---
+
+### BUILD PROMPT ENTRY
+Date: 2026-03-15 18:05
+Task ID: BUILD-20260315-001
+Agent: OpenCode
+Task: build
+
+Scope:
+- src/app/ui.py
+- tests/test_ui.py
+
+Prompt Summary:
+Implement a dedicated history mode in `src/app/ui.py` so pressing `h` hides the tree, shows only history entries, supports Up/Down navigation, and uses Enter to select a history entry and return to the normal tree view.
+
+Result Summary:
+Added a dedicated history mode with its own selection state, removed the temporary overlay behavior, preserved existing `b`/`f` and normal tree navigation behavior, and added focused UI tests.
+
+---
+
+### BUILD PROMPT ENTRY
+Date: 2026-03-15 19:25
+Task ID: BUILD-20260315-002
+Agent: OpenCode
+Task: build
+
+Scope:
+- instructions-agent.md
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Prompt Summary:
+Introduce a mandatory AI logging system by updating `instructions-agent.md` and adding repository logs for AI work entries and prompt summaries.
+
+Result Summary:
+Added enforceable AI logging rules to `instructions-agent.md`, created `docs/ai-worklog.md` and `docs/ai-prompts.md`, and established a traceable workflow for recording significant AI-assisted tasks.
+
+---
+
+### BUILD PROMPT ENTRY
+Date: 2026-03-15 20:00
+Task ID: BUILD-20260315-003
+Agent: OpenCode
+Task: build
+
+Scope:
+- instructions-agent.md
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Prompt Summary:
+Introduce a standard AI log entry format in `instructions-agent.md` and record the change in the repository AI logs.
+
+Result Summary:
+Added standardized `AI BUILD ENTRY` and `AI PLAN ENTRY` formats, improving consistency and long-term traceability of AI-assisted development.
+
+---
+
+### BUILD PROMPT ENTRY
+Date: 2026-03-15 21:35
+Task ID: BUILD-20260315-004
+Agent: OpenCode
+Task: build
+
+Scope:
+- src/app/ui.py
+- tests/test_ui.py
+
+Prompt Summary:
+Improve keyboard navigation in `src/app/ui.py` so Right expands or enters, Left collapses or goes to the parent, Enter confirms the selected destination, and ESC cancels back to the starting directory.
+
+Result Summary:
+Updated the tree-mode key handling in the terminal UI, preserved history mode behavior, and added focused UI tests for the new navigation rules.
+
+---
+
+### BUILD PROMPT ENTRY
+Date: 2026-03-15 22:20
+Task ID: BUILD-20260315-005
+Agent: OpenCode
+Task: build
+
+Scope:
+- src/app/ui.py
+- tests/test_ui.py
+
+Prompt Summary:
+Improve vertical scrolling in `src/app/ui.py` so the selected entry always remains visible in tree mode and history mode when the list is taller than the screen.
+
+Result Summary:
+Added UI scroll offset handling for tree and history views, kept existing navigation behavior unchanged, and added focused tests for the scroll helper logic.
+
+---
+
+### BUILD PROMPT ENTRY
+Date: 2026-03-16 00:27
+Task ID: BUILD-20260316-001
+Agent: OpenCode
+Task: build
+
+Scope:
+- src/app/ui.py
+- tests/test_ui.py
+
+Prompt Summary:
+Refine terminal UI navigation, maintain dedicated history mode, and ensure scrolling continuity so selections remain visible.
+
+Result Summary:
+Updated terminal UI behavior, consolidated navigation improvements, and ensured consistent scrolling and selection visibility across tree and history modes.
+
+---
+
+### BUILD PROMPT ENTRY
+Date: 2026-03-16 01:26
+Task ID: BUILD-20260316-002
+Agent: OpenCode
+Task: build
+
+Scope:
+- instructions-agent.md
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Prompt Summary:
+Finalize the AI logging format system by requiring timestamped structured log entries and aligning the repository worklog and prompt log with the current logging framework.
+
+Result Summary:
+Updated the logging instructions, normalized the prompt log to the structured entry format, and added matching repository log entries for the finalized AI logging system.
+
+---
+
+### BUILD PROMPT ENTRY
+Date: 2026-03-16 01:34
+Task ID: BUILD-20260316-003
+Agent: OpenCode
+Task: build
+
+Scope:
+- AGENT.md
+- AGENT_WORKFLOW.md
+- AI_TASK_TEMPLATE.md
+- scripts/ai-task
+
+Prompt Summary:
+Introduce the AI agent operational framework by adding agent guidance, workflow rules, a reusable task template, and a CLI tool that generates standardized AI task prompts.
+
+Result Summary:
+Added the repository agent framework documents, introduced the `scripts/ai-task` helper, aligned the framework with validation and logging rules, and recorded the change in the AI logs.
+
+---
+
+### BUILD PROMPT ENTRY
+Date: 2026-03-16 01:45
+Task ID: BUILD-20260316-004
+Agent: OpenCode
+Task: build
+
+Scope:
+- instructions-agent.md
+- AGENT.md
+- AGENT_WORKFLOW.md
+- AI_TASK_TEMPLATE.md
+- scripts/ai-task
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Prompt Summary:
+Finalize and publish the repository AI agent workflow and instruction framework by strengthening workflow and logging rules, documenting the agent framework files, and shipping the task generation tooling.
+
+Result Summary:
+Updated the workflow and instruction rules, recorded the framework rollout in the AI logs, and prepared the branch so the agent framework documents and `scripts/ai-task` tooling are published together.
+
+---
+
+### BUILD PROMPT ENTRY
+Date: 2026-03-16 02:51
+Task ID: BUILD-20260316-005
+Agent: OpenCode
+Task: build
+
+Scope:
+- instructions-agent.md
+- AGENT_WORKFLOW.md
+- AI_TASK_TEMPLATE.md
+- scripts/ai-task
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+- docs/ai-execution-log.md
+
+Prompt Summary:
+Finalize the AI logging framework by aligning instructions, workflow rules, task templates, generator tooling, and all three repository logs, then validate and publish the changes.
+
+Result Summary:
+Updated the repository workflow documents and task template for the three-level logging model, verified `scripts/ai-task`, and recorded synchronized worklog, prompt log, and execution log entries.

docs/ai-worklog.md

@@ -0,0 +1,377 @@
+# AI Worklog
+
+This file records important AI‑assisted development actions.
+
+The log is designed for long‑term traceability of AI‑driven development.
+
+Each entry must include:
+- Date (YYYY-MM-DD HH:MM)
+- Task ID
+- Agent
+- Task type (plan/build)
+- Objective
+- Scope
+- Files Modified / Files Inspected
+- Key Decisions or Proposed Changes
+- Validation
+- Result
+- Open Issues
+
+Entries must remain chronological.
+
+---
+
+### AI BUILD ENTRY
+Date: 2026-03-15 18:10
+Task ID: BUILD-20260315-001
+Agent: OpenCode
+Task: build
+Objective: Replace the temporary history debug overlay with a dedicated history mode in the terminal UI.
+
+Scope:
+- src/app/ui.py
+- tests/test_ui.py
+
+Files Modified:
+- src/app/ui.py
+- tests/test_ui.py
+
+Key Decisions:
+- Keep `b` and `f` unchanged.
+- Add separate history-mode selection state inside the UI.
+- Hide the tree while history mode is active.
+- Use Enter to select a history entry and return to the tree view.
+
+Validation:
+- make fix
+- make quality
+
+Result:
+- History mode now shows only the history list and allows navigation and selection of past directories.
+
+Open Issues:
+- None
+
+---
+
+### AI BUILD ENTRY
+Date: 2026-03-15 19:30
+Task ID: BUILD-20260315-002
+Agent: OpenCode
+Task: build
+Objective: Introduce mandatory AI logging rules and repository logging workflow.
+
+Scope:
+- instructions-agent.md
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Files Modified:
+- instructions-agent.md
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Key Decisions:
+- Require AI agents to log plan and build tasks.
+- Separate logs for work results and prompts.
+- Keep entries concise and user‑focused.
+
+Validation:
+- not run
+
+Result:
+- Repository now enforces AI logging via instructions-agent.md.
+
+Open Issues:
+- None
+
+---
+
+### AI BUILD ENTRY
+Date: 2026-03-15 20:05
+Task ID: BUILD-20260315-003
+Agent: OpenCode
+Task: build
+Objective: Introduce the standard AI log entry format and improve logging consistency.
+
+Scope:
+- instructions-agent.md
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Files Modified:
+- instructions-agent.md
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Key Decisions:
+- Define AI BUILD ENTRY and AI PLAN ENTRY blocks.
+- Standardize structure for long‑term repository traceability.
+
+Validation:
+- make fix (passed)
+- make quality (passed)
+
+Result:
+- Repository now uses a standardized AI logging format.
+
+Open Issues:
+- None
+
+---
+
+### AI BUILD ENTRY
+Date: 2026-03-15 21:40
+Task ID: BUILD-20260315-004
+Agent: OpenCode
+Task: build
+Objective: Improve keyboard navigation behavior in the terminal UI for tree mode.
+
+Scope:
+- src/app/ui.py
+- tests/test_ui.py
+
+Files Modified:
+- src/app/ui.py
+- tests/test_ui.py
+
+Key Decisions:
+- Right expands collapsed directories and enters expanded directories.
+- Left collapses expanded directories or navigates to the parent directory.
+- Enter confirms the selected path.
+- ESC cancels and returns to the original directory.
+
+Validation:
+- make fix (passed)
+- make quality (passed)
+
+Result:
+- Tree navigation semantics improved with clearer expand, enter, and cancel behavior.
+
+Open Issues:
+- None
+
+---
+
+### AI BUILD ENTRY
+Date: 2026-03-15 22:25
+Task ID: BUILD-20260315-005
+Agent: OpenCode
+Task: build
+Objective: Implement vertical scrolling so the selected entry always remains visible.
+
+Scope:
+- src/app/ui.py
+- tests/test_ui.py
+
+Files Modified:
+- src/app/ui.py
+- tests/test_ui.py
+
+Key Decisions:
+- Introduce scroll offsets in the UI state.
+- Clamp offsets to keep the selected row visible.
+- Apply the same mechanism to history mode.
+
+Validation:
+- make fix (passed)
+- make quality (passed)
+
+Result:
+- Tree and history views now scroll when navigating beyond the visible screen area.
+
+Open Issues:
+- None
+
+---
+
+### AI BUILD ENTRY
+Date: 2026-03-16 00:27
+Task ID: BUILD-20260316-001
+Agent: OpenCode
+Task: build
+Objective: Consolidate terminal UI navigation improvements and document updated behavior.
+
+Scope:
+- src/app/ui.py
+- tests/test_ui.py
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Files Modified:
+- src/app/ui.py
+- tests/test_ui.py
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Key Decisions:
+- Maintain dedicated history mode.
+- Refine tree-mode keyboard behavior.
+- Keep UI logic isolated from navigator logic.
+
+Validation:
+- make fix (passed)
+- make quality (passed)
+
+Result:
+- Terminal UI now includes history mode, improved navigation semantics, and reliable vertical scrolling.
+
+Open Issues:
+- None
+
+---
+
+### AI BUILD ENTRY
+Date: 2026-03-16 01:26
+Task ID: BUILD-20260316-002
+Agent: OpenCode
+Task: build
+Objective: Finalize the AI logging format system and align repository log files with the structured logging framework.
+
+Scope:
+- instructions-agent.md
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Files Modified:
+- instructions-agent.md
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Key Decisions:
+- Require timestamped log entries with date and time, Task ID, Agent, and Scope fields.
+- Keep the worklog and prompt log aligned with the current structured logging framework.
+- Normalize prompt logging into a single consistent `BUILD PROMPT ENTRY` format.
+
+Validation:
+- make fix (passed)
+- make quality (passed)
+
+Result:
+- The AI logging system now uses consistent structured entries across repository instructions, worklog history, and prompt history.
+
+Open Issues:
+- None
+
+---
+
+### AI BUILD ENTRY
+Date: 2026-03-16 01:34
+Task ID: BUILD-20260316-003
+Agent: OpenCode
+Task: build
+Objective: Introduce the AI agent operational framework and task generation tooling for standardized AI-assisted repository work.
+
+Scope:
+- AGENT.md
+- AGENT_WORKFLOW.md
+- AI_TASK_TEMPLATE.md
+- scripts/ai-task
+
+Files Modified:
+- AGENT.md
+- AGENT_WORKFLOW.md
+- AI_TASK_TEMPLATE.md
+- scripts/ai-task
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Key Decisions:
+- Define separate documents for agent behavior, operational workflow, and reusable task structure.
+- Keep the task generator focused on producing standardized PLAN and BUILD prompts with task IDs and validation requirements.
+- Align the new framework with the repository logging rules and validation workflow.
+
+Validation:
+- scripts/ai-task build "test task" src/app/ui.py (passed)
+- make fix (passed)
+- make quality (passed)
+
+Result:
+- The repository now includes a documented AI agent framework and an executable helper tool for generating standardized AI task prompts.
+
+Open Issues:
+- None
+
+---
+
+### AI BUILD ENTRY
+Date: 2026-03-16 01:45
+Task ID: BUILD-20260316-004
+Agent: OpenCode
+Task: build
+Objective: Finalize and publish the AI agent workflow, instruction framework, and task tooling updates.
+
+Scope:
+- instructions-agent.md
+- AGENT.md
+- AGENT_WORKFLOW.md
+- AI_TASK_TEMPLATE.md
+- scripts/ai-task
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Files Modified:
+- instructions-agent.md
+- AGENT_WORKFLOW.md
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+
+Key Decisions:
+- Strengthen commit and logging order rules so AI logs must be written before creating commits.
+- Keep the new agent framework documents and task tooling aligned with the repository validation and traceability model.
+- Publish the previously prepared framework files together with the finalized logging guidance on the current branch.
+
+Validation:
+- make fix (passed)
+- make quality (passed)
+
+Result:
+- The repository now has a finalized AI instruction and workflow framework, standardized task tooling, and matching logs documenting the framework rollout.
+
+Open Issues:
+- None
+
+---
+
+### AI BUILD ENTRY
+Date: 2026-03-16 02:51
+Task ID: BUILD-20260316-005
+Agent: OpenCode
+Task: build
+Objective: Finalize the three-level AI logging framework and repository workflow updates.
+
+Scope:
+- instructions-agent.md
+- AGENT_WORKFLOW.md
+- AI_TASK_TEMPLATE.md
+- scripts/ai-task
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+- docs/ai-execution-log.md
+
+Files Modified:
+- instructions-agent.md
+- AGENT_WORKFLOW.md
+- AI_TASK_TEMPLATE.md
+- scripts/ai-task
+- docs/ai-worklog.md
+- docs/ai-prompts.md
+- docs/ai-execution-log.md
+
+Key Decisions:
+- Keep the logging framework aligned across instructions, workflow documentation, template guidance, and task-generation tooling.
+- Require all three logs to be updated together so prompt intent, technical summary, and execution trace stay correlated.
+- Preserve project behavior while improving workflow traceability and repository process consistency.
+
+Validation:
+- scripts/ai-task build "test task" src/app/ui.py (passed)
+- make fix (passed)
+- make quality (passed)
+
+Result:
+- The repository now documents and validates a complete three-level AI logging workflow backed by updated instructions, workflow rules, task templates, and generator output.
+
+Open Issues:
+- None
+
+---

docs/logo-galicia-ansi-demo.zsh

@@ -0,0 +1,34 @@
+#!/bin/zsh
+set +H
+
+blue=$'\033[38;2;0;114;206m'
+white=$'\033[38;2;245;245;245m'
+reset=$'\033[0m'
+
+print_line() {
+  local r="$1"
+  local line="$2"
+  local out=""
+  local c ch center band
+
+  center=$((6 + r*12))
+  band=6
+
+  for ((c=1; c<=${#line}; c++)); do
+    ch="${line[c]}"
+    if [[ "$ch" == " " ]]; then
+      out+=" "
+    elif (( c-1 >= center-band && c-1 <= center+band )); then
+      out+="${blue}${ch}${reset}"
+    else
+      out+="${white}${ch}${reset}"
+    fi
+  done
+  print -r -- "$out"
+}
+
+print_line 0 "         █     ███            "
+print_line 1 "         █     █  █                  ██   ██   "
+print_line 2 " ███   ███     ███  █/█  ██   █   █ █_   █__█   █/█"
+print_line 3 "█     █  █ ███ █  █ █   █  █  █ █ █   █  █      █"
+print_line 4 " ███   ███     ███  █    ██    █ █  ██    ██    █"

instructions-agent.md

@@ -1,61 +0,0 @@
-# Agent Instructions: Universal Python Project Template
-
-## Project Overview
-This repository is a universal and adaptable Python template intended to serve as a professional starting point for new projects.
-
-## Core Directives
-1. All code, comments, variables, string literals, commit messages, and documentation must be written in English.
-2. Use Python 3.11+ with type hints whenever possible.
-3. Follow clean code principles and PEP 8.
-4. Keep modules small, cohesive, and maintainable.
-5. Use consistent docstrings for public classes and functions.
-6. Prefer explicit error handling over silent failures.
-
-## Architecture Guidelines
-1. Keep business logic separate from infrastructure concerns.
-2. Avoid mixing configuration, I/O, and domain logic in the same module.
-3. Prefer reusable services over duplicated logic.
-4. Do not introduce unnecessary complexity or premature abstractions.
-
-## Quality Standards
-1. Every meaningful feature should include tests.
-2. Run formatting, linting, and type checks before considering a task complete.
-3. Keep the README updated whenever setup, commands, or structure changes.
-4. Do not leave placeholder code unless clearly marked.
-
-## Tooling
-- Testing: pytest
-- Formatting: black
-- Linting: ruff
-- Static typing: mypy
-
-## Expected Project Structure
-src/app/
-tests/
-scripts/
-README.md
-instructions-agent.md
-pyproject.toml
-
-## Agent Workflow
-1. First understand the repository structure.
-2. Propose a short implementation plan before major changes.
-3. Reuse existing modules whenever possible.
-4. Keep changes minimal, coherent, and production-oriented.
-5. Validate changes with tests and quality tools when possible.
-
-## Application Specification
-
-This repository includes an application specification that defines the expected behavior of the project.
-
-Primary specification file:
-
-- `specs/cd_browser_spec.md`
-
-Agent rules:
-
-1. Before implementing any feature, read the application specification.
-2. If implementation details are unclear, follow the specification first.
-3. If the specification conflicts with a previous assumption, the specification takes precedence.
-4. Keep implementation aligned with the MVP scope unless explicitly asked to extend it.
-5. After code changes, run the appropriate validation workflow defined by this repository.

pyproject.toml

@@ -4,17 +4,31 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "cd-browser"
-version = "0.1.0"
+version = "0.3.0"
-description = "A universal and adaptable Python project template for AI-assisted development."
+description = "A fast keyboard-driven directory navigator for the terminal."
 readme = "README.md"
-requires-python = ">=3.11"
+requires-python = ">=3.8"
 authors = [
   { name = "Saky" }
 ]
+classifiers = [
+  "Development Status :: 3 - Alpha",
+  "Intended Audience :: Developers",
+  "License :: OSI Approved :: MIT License",
+  "Operating System :: OS Independent",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3.8",
+  "Programming Language :: Python :: 3.9",
+  "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
+  "Topic :: Utilities",
+]
 dependencies = []
 
 [project.scripts]
 cd_browser = "app.main:main"
+cd_browser_post_install = "cd_browser_post_install:main"
 
 [project.optional-dependencies]
 dev = [
@@ -27,6 +41,7 @@ dev = [
 
 [tool.setuptools]
 package-dir = {"" = "src"}
+py-modules = ["cd_browser_post_install"]
 
 [tool.setuptools.packages.find]
 where = ["src"]

scripts/ai-task

@@ -0,0 +1,149 @@
+#!/usr/bin/env bash
+
+# ai-task
+# Helper CLI to generate AI task prompts based on AI_TASK_TEMPLATE.md
+# Usage:
+#   scripts/ai-task build "Objective text" [scope...]
+#   scripts/ai-task plan "Objective text" [scope...]
+
+set -e
+
+TYPE="$1"
+OBJECTIVE="$2"
+shift 2 || true
+SCOPE=("$@")
+
+if [[ -z "$TYPE" || -z "$OBJECTIVE" ]]; then
+  echo "Usage: ai-task <plan|build> \"Objective\" [scope files...]"
+  exit 1
+fi
+
+TYPE_LOWER=$(echo "$TYPE" | tr '[:upper:]' '[:lower:]')
+TYPE_UPPER=$(echo "$TYPE_LOWER" | tr '[:lower:]' '[:upper:]')
+
+DATE=$(date "+%Y-%m-%d %H:%M")
+DAY=$(date "+%Y%m%d")
+
+case "$TYPE_LOWER" in
+  build)
+    PREFIX="BUILD"
+    ;;
+  plan)
+    PREFIX="PLAN"
+    ;;
+  *)
+    echo "Error: task type must be 'plan' or 'build'"
+    exit 1
+    ;;
+esac
+
+WORKLOG_FILE="docs/ai-worklog.md"
+PROMPTS_FILE="docs/ai-prompts.md"
+EXECUTION_LOG_FILE="docs/ai-execution-log.md"
+
+check_task_id_order() {
+  local file="$1"
+  local prefix="$2"
+  local previous=""
+  local current=""
+
+  [[ -f "$file" ]] || return 0
+
+  while IFS= read -r current; do
+    if [[ -n "$previous" && "$current" < "$previous" ]]; then
+      echo "Error: task IDs in $file are out of chronological order for prefix $prefix" >&2
+      echo "Previous: $previous" >&2
+      echo "Current:  $current" >&2
+      echo "Please fix the log order before generating a new task." >&2
+      exit 1
+    fi
+    previous="$current"
+  done < <(grep -Eo "${prefix}-[0-9]{8}-[0-9]{3}" "$file" || true)
+}
+
+check_task_id_order "$WORKLOG_FILE" "$PREFIX"
+check_task_id_order "$PROMPTS_FILE" "$PREFIX"
+check_task_id_order "$EXECUTION_LOG_FILE" "$PREFIX"
+
+LAST_SEQ=0
+
+if [[ -f "$WORKLOG_FILE" ]]; then
+  LAST_MATCH=$(grep -Eo "${PREFIX}-${DAY}-[0-9]{3}" "$WORKLOG_FILE" | tail -n 1 || true)
+  if [[ -n "$LAST_MATCH" ]]; then
+    LAST_SEQ=${LAST_MATCH##*-}
+    LAST_SEQ=$((10#$LAST_SEQ))
+  fi
+fi
+
+NEXT_SEQ=$(printf "%03d" $((LAST_SEQ + 1)))
+TASK_ID="${PREFIX}-${DAY}-${NEXT_SEQ}"
+
+# Build scope block
+cat <<EOF
+Task Type:
+${TYPE_UPPER}
+
+Task ID:
+${TASK_ID}
+
+Date:
+${DATE}
+
+Objective:
+${OBJECTIVE}
+
+Context:
+<describe repository state if needed>
+
+Scope:
+EOF
+
+if [ ${#SCOPE[@]} -gt 0 ]; then
+  for item in "${SCOPE[@]}"; do
+    printf '%s\n' "- ${item}"
+  done
+else
+  printf '%s\n' "- <fill scope>"
+fi
+
+cat <<EOF
+
+Requirements:
+<describe expected behavior>
+
+Constraints:
+- follow AGENT_WORKFLOW.md
+- keep scope minimal
+- preserve existing behavior unless explicitly changed
+
+Testing:
+<describe expected tests>
+
+Validation:
+make fix
+make quality
+
+Logging requirements:
+- append entry to docs/ai-worklog.md
+- append entry to docs/ai-prompts.md
+- include Date, Task ID, Agent, Scope
+- use Task ID: ${TASK_ID}
+- maintain chronological Task ID order in ai-worklog.md, ai-prompts.md and ai-execution-log.md
+- append entry to docs/ai-execution-log.md
+
+Execution Logging requirements:
+- append entry to docs/ai-execution-log.md
+- include:
+  - full prompt
+  - agent todos
+  - final execution report
+- use the standard execution log format defined in docs/ai-execution-log.md
+
+Git requirements:
+- do NOT commit or push unless explicitly requested
+
+Expected Report:
+- files changed
+- behavior changes
+- validation results
+EOF

src/app/cli.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 from pathlib import Path
 
+from app.history import SessionHistory
 from app.navigator import Navigator
 from app.ui import TerminalUI
 
@@ -10,6 +11,6 @@ def run_cli(start_path: Path | None = None, ui: TerminalUI | None = None) -> Pat
     """Run the interactive directory browser and return the selected path."""
 
     initial_path = (start_path or Path.cwd()).expanduser().resolve()
-    navigator = Navigator(initial_path)
+    navigator = Navigator(initial_path, history=SessionHistory.persistent())
     terminal_ui = ui or TerminalUI()
     return terminal_ui.run(navigator)

src/app/config.py

@@ -5,5 +5,5 @@ from dataclasses import dataclass
 class AppConfig:
     """Application configuration."""
 
-    app_name: str = "Python AI Dev Template"
+    app_name: str = "cd-browser"
     debug: bool = False

src/app/devinfo.py

@@ -0,0 +1,168 @@
+from __future__ import annotations
+
+import subprocess
+import time
+from dataclasses import dataclass
+from pathlib import Path
+
+
+@dataclass(frozen=True, slots=True)
+class DevSnapshot:
+    """Development context for a path."""
+
+    repo_root: Path | None
+    git_branch: str | None
+    git_dirty: bool
+    last_commit: str | None
+    stack: tuple[str, ...]
+    commands: tuple[str, ...]
+
+    @property
+    def header_summary(self) -> str:
+        git_part = "git:-"
+        if self.git_branch:
+            dirty_marker = "*" if self.git_dirty else ""
+            git_part = f"git:{self.git_branch}{dirty_marker}"
+
+        stack_part = ",".join(self.stack[:2]) if self.stack else "-"
+        return f"{git_part} stack:{stack_part}"
+
+    def detail_lines(self, current_path: Path) -> list[str]:
+        lines = [f"Current path: {current_path}"]
+        if self.repo_root is None:
+            lines.append("Git: not a repository")
+        else:
+            dirty_text = "dirty" if self.git_dirty else "clean"
+            lines.append(f"Git root: {self.repo_root}")
+            lines.append(f"Git branch: {self.git_branch or '-'} ({dirty_text})")
+            if self.last_commit:
+                lines.append(f"Last commit: {self.last_commit}")
+
+        stack_text = ", ".join(self.stack) if self.stack else "-"
+        lines.append(f"Detected stack: {stack_text}")
+
+        if self.commands:
+            lines.append("Suggested commands:")
+            for command in self.commands:
+                lines.append(f"  - {command}")
+
+        return lines
+
+
+class DevInfoCache:
+    """Simple TTL cache for development snapshots."""
+
+    def __init__(self, ttl_seconds: float = 3.0) -> None:
+        self._ttl_seconds = ttl_seconds
+        self._cached_path: Path | None = None
+        self._cached_at: float = 0.0
+        self._cached_snapshot: DevSnapshot | None = None
+
+    def get(self, path: Path) -> DevSnapshot:
+        resolved_path = path.expanduser().resolve()
+        now = time.monotonic()
+        if (
+            self._cached_snapshot is not None
+            and self._cached_path == resolved_path
+            and (now - self._cached_at) <= self._ttl_seconds
+        ):
+            return self._cached_snapshot
+
+        snapshot = collect_dev_snapshot(resolved_path)
+        self._cached_path = resolved_path
+        self._cached_snapshot = snapshot
+        self._cached_at = now
+        return snapshot
+
+
+def collect_dev_snapshot(path: Path) -> DevSnapshot:
+    """Collect git and stack metadata for a path."""
+
+    repo_root = _git_repo_root(path)
+    git_branch: str | None = None
+    git_dirty = False
+    last_commit: str | None = None
+
+    if repo_root is not None:
+        git_branch = _run_command(
+            ["git", "-C", str(repo_root), "rev-parse", "--abbrev-ref", "HEAD"]
+        )
+        status_output = _run_command(
+            ["git", "-C", str(repo_root), "status", "--porcelain"]
+        )
+        git_dirty = bool(status_output)
+        last_commit = _run_command(
+            ["git", "-C", str(repo_root), "log", "-1", "--pretty=format:%h %s"]
+        )
+
+    stack = _detect_stack(path)
+    return DevSnapshot(
+        repo_root=repo_root,
+        git_branch=git_branch,
+        git_dirty=git_dirty,
+        last_commit=last_commit,
+        stack=stack,
+        commands=_suggested_commands(stack, repo_root is not None),
+    )
+
+
+def _git_repo_root(path: Path) -> Path | None:
+    result = _run_command(["git", "-C", str(path), "rev-parse", "--show-toplevel"])
+    if not result:
+        return None
+    return Path(result).expanduser().resolve()
+
+
+def _detect_stack(path: Path) -> tuple[str, ...]:
+    markers = (
+        ("pyproject.toml", "python"),
+        ("requirements.txt", "python"),
+        ("package.json", "node"),
+        ("go.mod", "go"),
+        ("Cargo.toml", "rust"),
+    )
+    found: list[str] = []
+    for marker, stack_name in markers:
+        if (path / marker).exists() and stack_name not in found:
+            found.append(stack_name)
+
+    return tuple(found)
+
+
+def _suggested_commands(stack: tuple[str, ...], has_git: bool) -> tuple[str, ...]:
+    commands: list[str] = []
+    if has_git:
+        commands.append("git status -sb")
+
+    if "python" in stack:
+        commands.extend(["pytest -q", "ruff check src tests"])
+    if "node" in stack:
+        commands.extend(["npm test", "npm run lint"])
+    if "go" in stack:
+        commands.append("go test ./...")
+    if "rust" in stack:
+        commands.append("cargo test")
+
+    return tuple(commands)
+
+
+def _run_command(command: list[str]) -> str | None:
+    try:
+        result = subprocess.run(
+            command,
+            check=False,
+            capture_output=True,
+            text=True,
+            timeout=0.35,
+        )
+    except (OSError, subprocess.SubprocessError):
+        return None
+
+    if result.returncode != 0:
+        return None
+
+    output = result.stdout.strip()
+    if not output:
+        return None
+
+    return output

src/app/filesystem.py

@@ -13,28 +13,95 @@ class DirectoryEntry:
     has_children: bool
 
 
-def list_directories(path: Path) -> list[DirectoryEntry]:
+@dataclass(frozen=True, slots=True)
+class FileSystemEntry:
+    """Filesystem entry metadata for tree rendering."""
+
+    name: str
+    path: Path
+    is_directory: bool
+    has_children: bool
+
+
+def list_directories(path: Path, show_hidden: bool = False) -> list[DirectoryEntry]:
     """Return direct child directories sorted by name."""
 
-    directory_path = path.expanduser().resolve()
+    entries = list_entries(path, show_hidden=show_hidden, include_files=False)
-    entries: list[DirectoryEntry] = []
+    return [
-
-    for child in directory_path.iterdir():
-        if child.is_dir():
-            entries.append(
         DirectoryEntry(
+            name=entry.name,
+            path=entry.path,
+            has_children=entry.has_children,
+        )
+        for entry in entries
+    ]
+
+
+def list_entries(
+    path: Path, show_hidden: bool = False, include_files: bool = False
+) -> list[FileSystemEntry]:
+    """Return direct child entries sorted by type and name."""
+
+    directory_path = path.expanduser().resolve()
+    entries: list[FileSystemEntry] = []
+
+    try:
+        children = list(directory_path.iterdir())
+    except PermissionError:
+        return []
+
+    for child in children:
+        try:
+            is_directory = child.is_dir()
+        except OSError:
+            continue
+
+        if not is_directory and not include_files:
+            continue
+        if not show_hidden and child.name.startswith("."):
+            continue
+
+        entries.append(
+            FileSystemEntry(
                 name=child.name,
                 path=child,
-                    has_children=has_subdirectories(child),
+                is_directory=is_directory,
+                has_children=(
+                    has_subdirectories(child, show_hidden=show_hidden)
+                    if is_directory
+                    else False
+                ),
             )
         )
 
-    return sorted(entries, key=lambda entry: entry.name.casefold())
+    return sorted(
+        entries,
+        key=lambda entry: (not entry.is_directory, entry.name.casefold()),
+    )
 
 
-def has_subdirectories(path: Path) -> bool:
+def has_subdirectories(path: Path, show_hidden: bool = False) -> bool:
     """Return whether the directory contains at least one subdirectory."""
 
     directory_path = path.expanduser().resolve()
 
-    return any(child.is_dir() for child in directory_path.iterdir())
+    try:
+        children = list(directory_path.iterdir())
+    except PermissionError:
+        return False
+
+    for child in children:
+        try:
+            is_directory = child.is_dir()
+        except OSError:
+            continue
+
+        if not is_directory:
+            continue
+
+        if not show_hidden and child.name.startswith("."):
+            continue
+
+        return True
+
+    return False

src/app/history.py

@@ -1,15 +1,46 @@
 from __future__ import annotations
 
+import os
 from dataclasses import dataclass, field
 from pathlib import Path
 
 
+def default_history_path() -> Path:
+    """Return the default on-disk history location."""
+
+    override = os.environ.get("CD_BROWSER_HISTORY_FILE")
+    if override:
+        return Path(override).expanduser()
+
+    if os.name == "nt":
+        base = Path(os.environ.get("APPDATA", str(Path.home() / "AppData" / "Roaming")))
+    else:
+        base = Path(os.environ.get("XDG_STATE_HOME", str(Path.home() / ".local/state")))
+
+    return base / "cd-browser" / "history.txt"
+
+
 @dataclass(slots=True)
 class SessionHistory:
     """In-memory session history for visited directories."""
 
     _entries: list[Path] = field(default_factory=list)
     _index: int = -1
+    storage_path: Path | None = None
+    max_entries: int = 500
+
+    @classmethod
+    def persistent(
+        cls, storage_path: Path | None = None, max_entries: int = 500
+    ) -> SessionHistory:
+        """Create a history instance backed by an on-disk file."""
+
+        history = cls(
+            storage_path=storage_path or default_history_path(),
+            max_entries=max_entries,
+        )
+        history._load()
+        return history
 
     def visit(self, path: Path) -> Path:
         """Record a directory visit and discard forward history when needed."""
@@ -23,7 +54,9 @@ class SessionHistory:
             self._entries = self._entries[: self._index + 1]
 
         self._entries.append(resolved_path)
+        self._trim_to_limit()
         self._index = len(self._entries) - 1
+        self._persist()
         return resolved_path
 
     @property
@@ -66,3 +99,48 @@ class SessionHistory:
         """Return the full history as an immutable sequence."""
 
         return tuple(self._entries)
+
+    def _load(self) -> None:
+        if self.storage_path is None:
+            return
+
+        try:
+            lines = self.storage_path.read_text(encoding="utf-8").splitlines()
+        except FileNotFoundError:
+            return
+        except OSError:
+            return
+
+        loaded_entries: list[Path] = []
+        for line in lines:
+            raw = line.strip()
+            if not raw:
+                continue
+
+            resolved = Path(raw).expanduser().resolve()
+            if loaded_entries and loaded_entries[-1] == resolved:
+                continue
+
+            loaded_entries.append(resolved)
+
+        self._entries = loaded_entries
+        self._trim_to_limit()
+        self._index = len(self._entries) - 1
+
+    def _persist(self) -> None:
+        if self.storage_path is None:
+            return
+
+        try:
+            self.storage_path.parent.mkdir(parents=True, exist_ok=True)
+            contents = "".join(f"{entry}\n" for entry in self._entries)
+            self.storage_path.write_text(contents, encoding="utf-8")
+        except OSError:
+            return
+
+    def _trim_to_limit(self) -> None:
+        limit = max(1, self.max_entries)
+        if len(self._entries) <= limit:
+            return
+
+        self._entries = self._entries[-limit:]

src/app/navigator.py

@@ -3,13 +3,13 @@ from __future__ import annotations
 from dataclasses import dataclass, field
 from pathlib import Path
 
-from app.filesystem import list_directories
+from app.filesystem import list_entries
 from app.history import SessionHistory
 
 
 @dataclass(frozen=True, slots=True)
 class VisibleEntry:
-    """A directory row visible in the navigator."""
+    """A row visible in the navigator tree."""
 
     name: str
     path: Path
@@ -17,6 +17,7 @@ class VisibleEntry:
     has_children: bool
     is_expanded: bool
     is_parent: bool = False
+    is_file: bool = False
 
 
 @dataclass(slots=True)
@@ -28,6 +29,8 @@ class Navigator:
     current_path: Path = field(init=False)
     selected_index: int = field(init=False, default=0)
     _expanded_paths: set[Path] = field(init=False, default_factory=set)
+    show_hidden: bool = False
+    show_files: bool = False
 
     def __post_init__(self) -> None:
         self.current_path = self.start_path.expanduser().resolve()
@@ -68,6 +71,9 @@ class Navigator:
     def enter_selected_directory(self) -> Path:
         """Enter the currently selected directory and record it in history."""
 
+        if self.selected_entry.is_file:
+            return self.current_path
+
         return self._change_directory(self.selected_entry.path)
 
     def go_to_parent_directory(self) -> Path:
@@ -144,6 +150,22 @@ class Navigator:
         self._set_current_path(path)
         return path
 
+    def toggle_hidden(self) -> None:
+        """Toggle showing/hiding hidden directory entries."""
+
+        self.show_hidden = not self.show_hidden
+        self._reset_view_state()
+
+    def toggle_files(self) -> None:
+        """Toggle showing/hiding file entries."""
+
+        self.show_files = not self.show_files
+        self._reset_view_state()
+
+    def _reset_view_state(self) -> None:
+        self.selected_index = 0
+        self._expanded_paths.clear()
+
     def select_history_entry(self, index: int) -> Path:
         """Jump to a directory stored in session history."""
 
@@ -154,20 +176,25 @@ class Navigator:
     def _build_entries(self, path: Path, depth: int) -> list[VisibleEntry]:
         entries: list[VisibleEntry] = []
 
-        for directory in list_directories(path):
+        for item in list_entries(
-            is_expanded = directory.path in self._expanded_paths
+            path, show_hidden=self.show_hidden, include_files=self.show_files
+        ):
+            is_expanded = (
+                item.path in self._expanded_paths if item.is_directory else False
+            )
             entries.append(
                 VisibleEntry(
-                    name=directory.name,
+                    name=item.name,
-                    path=directory.path,
+                    path=item.path,
                     depth=depth,
-                    has_children=directory.has_children,
+                    has_children=item.has_children,
                     is_expanded=is_expanded,
+                    is_file=not item.is_directory,
                 )
             )
 
             if is_expanded:
-                entries.extend(self._build_entries(directory.path, depth=depth + 1))
+                entries.extend(self._build_entries(item.path, depth=depth + 1))
 
         return entries
 

src/app/opener.py

@@ -0,0 +1,311 @@
+from __future__ import annotations
+
+import os
+import shlex
+import shutil
+import subprocess
+import sys
+from dataclasses import dataclass
+from functools import lru_cache
+from pathlib import Path
+from typing import Literal
+
+try:
+    import tomllib
+except ModuleNotFoundError:  # pragma: no cover - python < 3.11
+    tomllib = None  # type: ignore[assignment]
+
+LaunchMode = Literal["background", "blocking"]
+DEFAULT_FILE_OPENERS = ("code", "open", "antigravity", "nvim", "nano", "less", "bat")
+DEFAULT_DIRECTORY_OPENERS = ("code", "opencode", "antigravity", "nvim")
+
+
+@dataclass(frozen=True, slots=True)
+class OpenWithOption:
+    """Candidate application command for opening a path."""
+
+    label: str
+    command_template: str
+    executable: str
+    launch_mode: LaunchMode
+    requires_gui: bool = False
+    supports_files: bool = True
+    supports_directories: bool = True
+
+
+def available_openers(path: Path) -> list[OpenWithOption]:
+    """Return available open-with options for a file or directory path."""
+
+    is_directory = path.is_dir()
+    has_gui = _has_gui_session()
+    options: list[OpenWithOption] = []
+    catalog = _options_catalog()
+    configured_option_ids = _configured_option_ids(is_directory, catalog)
+
+    for option_id in configured_option_ids:
+        option = catalog[option_id]
+        if is_directory and not option.supports_directories:
+            continue
+        if not is_directory and not option.supports_files:
+            continue
+        if option.requires_gui and not has_gui:
+            continue
+        if not shutil.which(option.executable):
+            continue
+
+        options.append(option)
+
+    return options
+
+
+def launch_background_option(path: Path, option: OpenWithOption) -> tuple[bool, str]:
+    """Launch a non-blocking option and return status/message."""
+
+    command = _command_parts(option.command_template, path)
+    if not command:
+        return False, "Invalid open command"
+
+    try:
+        subprocess.Popen(command, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+    except OSError as error:
+        return False, f"Open failed: {error}"
+
+    return True, f"Opened with {option.label}"
+
+
+def launch_blocking_option(path: Path, option: OpenWithOption) -> tuple[bool, str]:
+    """Launch a blocking terminal option and return status/message."""
+
+    command = _command_parts(option.command_template, path)
+    if not command:
+        return False, "Invalid open command"
+
+    try:
+        result = subprocess.run(command, check=False)
+    except OSError as error:
+        return False, f"Open failed: {error}"
+
+    if result.returncode != 0:
+        return (
+            False,
+            f"Open failed: {option.label} exited with code {result.returncode}",
+        )
+
+    return True, f"Opened with {option.label}"
+
+
+def is_blocking_option(option: OpenWithOption) -> bool:
+    """Return whether the option should block the current terminal session."""
+
+    return option.launch_mode == "blocking"
+
+
+def _options_catalog() -> dict[str, OpenWithOption]:
+    return {
+        "code": OpenWithOption(
+            label="VS Code",
+            command_template="code {path}",
+            executable="code",
+            launch_mode="background",
+            requires_gui=True,
+        ),
+        "open": OpenWithOption(
+            label="Open (system)",
+            command_template=_system_open_template(),
+            executable=_system_open_executable(),
+            launch_mode="background",
+            requires_gui=True,
+            supports_directories=False,
+        ),
+        "opencode": OpenWithOption(
+            label="OpenCode",
+            command_template="opencode {path}",
+            executable="opencode",
+            launch_mode="background",
+            supports_files=False,
+        ),
+        "antigravity": OpenWithOption(
+            label="Antigravity",
+            command_template="antigravity {path}",
+            executable="antigravity",
+            launch_mode="background",
+        ),
+        "nvim": OpenWithOption(
+            label="Neovim",
+            command_template="nvim {path}",
+            executable="nvim",
+            launch_mode="blocking",
+        ),
+        "nano": OpenWithOption(
+            label="Nano",
+            command_template="nano {path}",
+            executable="nano",
+            launch_mode="blocking",
+            supports_directories=False,
+        ),
+        "less": OpenWithOption(
+            label="Less",
+            command_template="less {path}",
+            executable="less",
+            launch_mode="blocking",
+            supports_directories=False,
+        ),
+        "bat": OpenWithOption(
+            label="Bat",
+            command_template="bat {path}",
+            executable="bat",
+            launch_mode="blocking",
+            supports_directories=False,
+        ),
+    }
+
+
+def _configured_option_ids(
+    is_directory: bool, catalog: dict[str, OpenWithOption]
+) -> list[str]:
+    config = _load_openers_config()
+    defaults = (
+        list(DEFAULT_DIRECTORY_OPENERS) if is_directory else list(DEFAULT_FILE_OPENERS)
+    )
+    configured = config["directories"] if is_directory else config["files"]
+
+    seen: set[str] = set()
+    option_ids: list[str] = []
+    for option_id in configured:
+        if option_id not in catalog or option_id in seen:
+            continue
+        seen.add(option_id)
+        option_ids.append(option_id)
+
+    if option_ids:
+        return option_ids
+
+    return [option_id for option_id in defaults if option_id in catalog]
+
+
+def _openers_config_path() -> Path:
+    override = os.environ.get("CD_BROWSER_CONFIG_FILE")
+    if override:
+        return Path(override).expanduser()
+
+    if os.name == "nt":
+        base = Path(os.environ.get("APPDATA", str(Path.home() / "AppData" / "Roaming")))
+    else:
+        base = Path(os.environ.get("XDG_CONFIG_HOME", str(Path.home() / ".config")))
+
+    return base / "cd-browser" / "config.toml"
+
+
+@lru_cache(maxsize=1)
+def _load_openers_config() -> dict[str, list[str]]:
+    defaults = {
+        "files": list(DEFAULT_FILE_OPENERS),
+        "directories": list(DEFAULT_DIRECTORY_OPENERS),
+    }
+    config_path = _openers_config_path()
+    _ensure_default_config_file(config_path)
+    if tomllib is None or not config_path.exists():
+        return defaults
+
+    try:
+        raw_data = tomllib.loads(config_path.read_text(encoding="utf-8"))
+    except (OSError, tomllib.TOMLDecodeError):
+        return defaults
+
+    if not isinstance(raw_data, dict):
+        return defaults
+
+    open_with = raw_data.get("open_with")
+    if not isinstance(open_with, dict):
+        return defaults
+
+    files = open_with.get("files")
+    directories = open_with.get("directories")
+    return {
+        "files": _normalize_ids(files, defaults["files"]),
+        "directories": _normalize_ids(directories, defaults["directories"]),
+    }
+
+
+def _normalize_ids(value: object, fallback: list[str]) -> list[str]:
+    if not isinstance(value, list):
+        return fallback
+
+    normalized = [
+        item.strip() for item in value if isinstance(item, str) and item.strip()
+    ]
+    return normalized if normalized else fallback
+
+
+def _ensure_default_config_file(path: Path) -> None:
+    if path.exists():
+        return
+
+    try:
+        path.parent.mkdir(parents=True, exist_ok=True)
+        path.write_text(_default_config_toml(), encoding="utf-8")
+    except OSError:
+        return
+
+
+def _default_config_toml() -> str:
+    file_ids = '", "'.join(DEFAULT_FILE_OPENERS)
+    directory_ids = '", "'.join(DEFAULT_DIRECTORY_OPENERS)
+    return (
+        "# cd-browser opener configuration\n"
+        "# Reorder or remove items to customize menu priority.\n"
+        "[open_with]\n"
+        f'files = ["{file_ids}"]\n'
+        f'directories = ["{directory_ids}"]\n'
+    )
+
+
+def _reset_openers_config_cache() -> None:
+    _load_openers_config.cache_clear()
+
+
+def _has_gui_session() -> bool:
+    if os.environ.get("SSH_CONNECTION") or os.environ.get("SSH_TTY"):
+        return False
+
+    if sys.platform == "darwin":
+        return True
+
+    if sys.platform.startswith("linux"):
+        return bool(os.environ.get("DISPLAY") or os.environ.get("WAYLAND_DISPLAY"))
+
+    if sys.platform.startswith("win"):
+        return True
+
+    return False
+
+
+def _system_open_template() -> str:
+    if sys.platform == "darwin":
+        return "open {path}"
+
+    if sys.platform.startswith("linux"):
+        return "xdg-open {path}"
+
+    if sys.platform.startswith("win"):
+        return 'cmd /c start "" {path}'
+
+    return "open {path}"
+
+
+def _system_open_executable() -> str:
+    if sys.platform == "darwin":
+        return "open"
+
+    if sys.platform.startswith("linux"):
+        return "xdg-open"
+
+    if sys.platform.startswith("win"):
+        return "cmd"
+
+    return "open"
+
+
+def _command_parts(command_template: str, path: Path) -> list[str]:
+    rendered = command_template.format(path=shlex.quote(str(path)))
+    return shlex.split(rendered)

src/cd_browser_post_install.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+"""Post-install script for cd-browser to guide users on shell integration."""
+
+import os
+import sys
+
+
+def _profile_for_shell(shell: str) -> str:
+    if shell == "zsh":
+        return "~/.zshrc"
+
+    return "~/.bashrc"
+
+
+def _is_cd_function_present(profile_path: str) -> bool:
+    if not os.path.exists(profile_path):
+        return False
+
+    with open(profile_path, encoding="utf-8") as profile_file:
+        return "cd_() {" in profile_file.read()
+
+
+def main() -> None:
+    """Print shell integration instructions after installation."""
+    print("\n" + "=" * 60)
+    print("🎉 cd-browser installed successfully!")
+    print("=" * 60)
+    print()
+    print(
+        "To enable the 'cd_' command, you need to add a function to your shell profile."
+    )
+    print()
+
+    shell = os.environ.get("SHELL", "").split("/")[-1]
+    profile = _profile_for_shell(shell)
+
+    cd_function = """cd_() {
+  local target
+  target="$(cd_browser)" || return
+  if [ -n "$target" ] && [ -d "$target" ]; then
+    cd "$target"
+  fi
+}"""
+
+    print(f"Copy this to the end of {profile}:")
+    print()
+    print(cd_function)
+    print()
+
+    profile_path = os.path.expanduser(profile)
+
+    try:
+        response = (
+            input("Do you want me to add it automatically? (y/n): ").strip().lower()
+        )
+        if response == "y":
+            if _is_cd_function_present(profile_path):
+                print(f"\nℹ️ cd_() already exists in {profile}, no changes made.")
+            else:
+                with open(profile_path, "a", encoding="utf-8") as f:
+                    f.write("\n" + cd_function + "\n")
+                print(f"\n✅ Added to {profile}")
+            print(f"Run 'source {profile}' or restart your terminal to activate cd_.")
+        else:
+            print(f"\nAdd the function to {profile} manually.")
+            print(f"Then run 'source {profile}' or restart terminal.")
+    except EOFError:
+        print(
+            f"\nNo interactive input detected. Add the function to {profile} manually."
+        )
+        print(f"Then run 'source {profile}' or restart terminal.")
+    except KeyboardInterrupt:
+        print("\n\nSetup cancelled. You can add the function manually later.")
+        sys.exit(0)
+
+    print("\n" + "=" * 60)
+    print(
+        f"For uninstall: after 'pip uninstall cd-browser', remove cd_() from {profile}."
+    )
+    print("=" * 60 + "\n")
+
+
+if __name__ == "__main__":
+    main()

tests/test_cli.py

@@ -4,9 +4,10 @@ import pytest
 
 from app.cli import run_cli
 from app.navigator import Navigator
+from app.ui import TerminalUI
 
 
-class StubUI:
+class StubUI(TerminalUI):
     def __init__(self, result: Path) -> None:
         self.result = result
         self.navigator: Navigator | None = None

tests/test_filesystem.py

@@ -2,7 +2,13 @@ from pathlib import Path
 
 import pytest
 
-from app.filesystem import DirectoryEntry, has_subdirectories, list_directories
+from app.filesystem import (
+    DirectoryEntry,
+    FileSystemEntry,
+    has_subdirectories,
+    list_directories,
+    list_entries,
+)
 
 
 def test_has_subdirectories_detects_nested_directory(tmp_path: Path) -> None:
@@ -44,3 +50,55 @@ def test_list_directories_raises_for_missing_directory(tmp_path: Path) -> None:
 
     with pytest.raises(FileNotFoundError):
         list_directories(missing_path)
+
+
+def test_list_entries_returns_files_when_include_files_enabled(tmp_path: Path) -> None:
+    folder = tmp_path / "folder"
+    file_path = tmp_path / "notes.txt"
+    folder.mkdir()
+    file_path.write_text("content", encoding="utf-8")
+
+    assert list_entries(tmp_path, include_files=True) == [
+        FileSystemEntry(
+            name="folder",
+            path=folder,
+            is_directory=True,
+            has_children=False,
+        ),
+        FileSystemEntry(
+            name="notes.txt",
+            path=file_path,
+            is_directory=False,
+            has_children=False,
+        ),
+    ]
+
+
+def test_list_directories_skips_permission_errors_for_children(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    allowed = root / "allowed"
+    blocked = root / "blocked"
+    allowed.mkdir()
+    blocked.mkdir()
+
+    blocked.chmod(0)
+    try:
+        entries = list_directories(root)
+    finally:
+        blocked.chmod(0o700)
+
+    assert any(entry.name == "allowed" for entry in entries)
+
+
+def test_has_subdirectories_returns_false_on_permission_error(tmp_path: Path) -> None:
+    blocked = tmp_path / "blocked"
+    blocked.mkdir()
+
+    blocked.chmod(0)
+    try:
+        result = has_subdirectories(blocked)
+    finally:
+        blocked.chmod(0o700)
+
+    assert result is False

tests/test_history.py

@@ -2,7 +2,7 @@ from pathlib import Path
 
 import pytest
 
-from app.history import SessionHistory
+from app.history import SessionHistory, default_history_path
 
 
 def test_visit_records_current_directory(tmp_path: Path) -> None:
@@ -82,3 +82,48 @@ def test_select_raises_for_invalid_index() -> None:
 
     with pytest.raises(IndexError):
         history.select(0)
+
+
+def test_persistent_history_loads_entries_from_disk(tmp_path: Path) -> None:
+    first = tmp_path / "first"
+    second = tmp_path / "second"
+    for directory in (first, second):
+        directory.mkdir()
+    history_file = tmp_path / "history.txt"
+    history_file.write_text(f"{first}\n{second}\n", encoding="utf-8")
+
+    history = SessionHistory.persistent(storage_path=history_file)
+
+    assert history.entries() == (first.resolve(), second.resolve())
+    assert history.current == second.resolve()
+
+
+def test_persistent_history_visit_writes_to_disk_and_applies_limit(
+    tmp_path: Path,
+) -> None:
+    first = tmp_path / "first"
+    second = tmp_path / "second"
+    third = tmp_path / "third"
+    for directory in (first, second, third):
+        directory.mkdir()
+    history_file = tmp_path / "state" / "history.txt"
+
+    history = SessionHistory.persistent(storage_path=history_file, max_entries=2)
+    history.visit(first)
+    history.visit(second)
+    history.visit(third)
+
+    assert history.entries() == (second.resolve(), third.resolve())
+    assert history_file.read_text(encoding="utf-8").splitlines() == [
+        str(second.resolve()),
+        str(third.resolve()),
+    ]
+
+
+def test_default_history_path_uses_override_env(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
+    override = tmp_path / "custom-history.txt"
+    monkeypatch.setenv("CD_BROWSER_HISTORY_FILE", str(override))
+
+    assert default_history_path() == override

tests/test_navigator.py

@@ -25,6 +25,49 @@ def test_navigator_initial_state_includes_parent_entry(tmp_path: Path) -> None:
     ]
 
 
+def test_toggle_hidden_directories(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    visible = root / "visible"
+    visible.mkdir()
+    hidden = root / ".hidden"
+    hidden.mkdir()
+
+    navigator = Navigator(root)
+
+    assert [entry.name for entry in navigator.visible_entries] == ["..", "visible"]
+
+    navigator.toggle_hidden()
+    assert navigator.show_hidden is True
+    assert [entry.name for entry in navigator.visible_entries] == [
+        "..",
+        ".hidden",
+        "visible",
+    ]
+
+    navigator.toggle_hidden()
+    assert navigator.show_hidden is False
+    assert [entry.name for entry in navigator.visible_entries] == ["..", "visible"]
+
+
+def test_toggle_files_includes_files_in_visible_entries(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    (root / "folder").mkdir()
+    (root / "notes.txt").write_text("hello", encoding="utf-8")
+
+    navigator = Navigator(root)
+    assert [entry.name for entry in navigator.visible_entries] == ["..", "folder"]
+
+    navigator.toggle_files()
+    assert navigator.show_files is True
+    assert [entry.name for entry in navigator.visible_entries] == [
+        "..",
+        "folder",
+        "notes.txt",
+    ]
+
+
 def test_expand_selected_directory_reveals_nested_entries(tmp_path: Path) -> None:
     current = tmp_path / "workspace"
     current.mkdir()

tests/test_opener.py

@@ -0,0 +1,254 @@
+from __future__ import annotations
+
+from pathlib import Path
+from subprocess import CompletedProcess
+
+import pytest
+
+from app.opener import (
+    OpenWithOption,
+    _reset_openers_config_cache,
+    available_openers,
+    is_blocking_option,
+    launch_background_option,
+    launch_blocking_option,
+)
+
+
+@pytest.fixture(autouse=True)
+def reset_openers_config_cache() -> None:
+    _reset_openers_config_cache()
+
+
+def test_available_openers_headless_file_excludes_gui(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
+    file_path = tmp_path / "notes.txt"
+    file_path.write_text("hello", encoding="utf-8")
+
+    monkeypatch.setenv("SSH_CONNECTION", "1")
+
+    available = {
+        "antigravity": "/usr/local/bin/antigravity",
+        "nvim": "/usr/local/bin/nvim",
+        "nano": "/usr/bin/nano",
+        "less": "/usr/bin/less",
+        "bat": "/usr/local/bin/bat",
+        "code": "/usr/local/bin/code",
+        "open": "/usr/bin/open",
+    }
+    monkeypatch.setattr("app.opener.shutil.which", lambda name: available.get(name))
+
+    labels = [option.label for option in available_openers(file_path)]
+
+    assert "VS Code" not in labels
+    assert "Open (system)" not in labels
+    assert labels == ["Antigravity", "Neovim", "Nano", "Less", "Bat"]
+
+
+def test_available_openers_gui_directory_filters_file_only_tools(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
+    folder = tmp_path / "project"
+    folder.mkdir()
+
+    monkeypatch.delenv("SSH_CONNECTION", raising=False)
+    monkeypatch.setattr("app.opener.sys.platform", "darwin")
+
+    available = {
+        "antigravity": "/usr/local/bin/antigravity",
+        "nvim": "/usr/local/bin/nvim",
+        "nano": "/usr/bin/nano",
+        "less": "/usr/bin/less",
+        "bat": "/usr/local/bin/bat",
+        "code": "/usr/local/bin/code",
+        "open": "/usr/bin/open",
+    }
+    monkeypatch.setattr("app.opener.shutil.which", lambda name: available.get(name))
+
+    labels = [option.label for option in available_openers(folder)]
+
+    assert labels == ["VS Code", "Antigravity", "Neovim"]
+
+
+def test_available_openers_respects_configured_order(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
+    config_path = tmp_path / "config.toml"
+    config_path.write_text(
+        ('[open_with]\nfiles = ["nvim", "code"]\ndirectories = ["opencode", "code"]\n'),
+        encoding="utf-8",
+    )
+    monkeypatch.setenv("CD_BROWSER_CONFIG_FILE", str(config_path))
+    monkeypatch.delenv("SSH_CONNECTION", raising=False)
+    monkeypatch.setattr("app.opener.sys.platform", "darwin")
+
+    available = {
+        "opencode": "/usr/local/bin/opencode",
+        "nvim": "/usr/local/bin/nvim",
+        "code": "/usr/local/bin/code",
+    }
+    monkeypatch.setattr("app.opener.shutil.which", lambda name: available.get(name))
+
+    folder = tmp_path / "project"
+    folder.mkdir()
+    file_path = tmp_path / "notes.txt"
+    file_path.write_text("hello", encoding="utf-8")
+
+    folder_labels = [option.label for option in available_openers(folder)]
+    file_labels = [option.label for option in available_openers(file_path)]
+
+    assert folder_labels == ["OpenCode", "VS Code"]
+    assert file_labels == ["Neovim", "VS Code"]
+
+
+def test_available_openers_invalid_config_falls_back_to_defaults(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
+    config_path = tmp_path / "config.toml"
+    config_path.write_text("[open_with\n", encoding="utf-8")
+    monkeypatch.setenv("CD_BROWSER_CONFIG_FILE", str(config_path))
+    monkeypatch.setenv("SSH_CONNECTION", "1")
+
+    available = {
+        "antigravity": "/usr/local/bin/antigravity",
+        "nvim": "/usr/local/bin/nvim",
+        "nano": "/usr/bin/nano",
+        "less": "/usr/bin/less",
+        "bat": "/usr/local/bin/bat",
+    }
+    monkeypatch.setattr("app.opener.shutil.which", lambda name: available.get(name))
+
+    file_path = tmp_path / "notes.txt"
+    file_path.write_text("hello", encoding="utf-8")
+    labels = [option.label for option in available_openers(file_path)]
+
+    assert labels == ["Antigravity", "Neovim", "Nano", "Less", "Bat"]
+
+
+def test_available_openers_creates_default_config_when_missing(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
+    config_path = tmp_path / "config.toml"
+    monkeypatch.setenv("CD_BROWSER_CONFIG_FILE", str(config_path))
+    monkeypatch.setenv("SSH_CONNECTION", "1")
+    monkeypatch.setattr(
+        "app.opener.shutil.which",
+        lambda name: (
+            "/usr/bin/true" if name in {"nvim", "nano", "less", "bat"} else None
+        ),
+    )
+
+    file_path = tmp_path / "notes.txt"
+    file_path.write_text("hello", encoding="utf-8")
+    available_openers(file_path)
+
+    assert config_path.exists()
+    config_text = config_path.read_text(encoding="utf-8")
+    assert "[open_with]" in config_text
+    assert (
+        'files = ["code", "open", "antigravity", "nvim", "nano", "less", "bat"]'
+        in config_text
+    )
+
+
+def test_available_openers_does_not_override_existing_config(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
+    config_path = tmp_path / "config.toml"
+    original = '[open_with]\nfiles = ["nvim"]\ndirectories = ["opencode"]\n'
+    config_path.write_text(original, encoding="utf-8")
+    monkeypatch.setenv("CD_BROWSER_CONFIG_FILE", str(config_path))
+    monkeypatch.setenv("SSH_CONNECTION", "1")
+    monkeypatch.setattr(
+        "app.opener.shutil.which",
+        lambda name: "/usr/bin/true" if name in {"nvim", "opencode"} else None,
+    )
+
+    file_path = tmp_path / "notes.txt"
+    file_path.write_text("hello", encoding="utf-8")
+    available_openers(file_path)
+
+    assert config_path.read_text(encoding="utf-8") == original
+
+
+def test_launch_background_option_returns_success(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
+    option = OpenWithOption(
+        label="VS Code",
+        command_template="code {path}",
+        executable="code",
+        launch_mode="background",
+        requires_gui=True,
+    )
+
+    monkeypatch.setattr("app.opener.subprocess.Popen", lambda *args, **kwargs: None)
+
+    success, message = launch_background_option(tmp_path, option)
+
+    assert success is True
+    assert "VS Code" in message
+
+
+def test_launch_blocking_option_reports_non_zero_exit(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
+    option = OpenWithOption(
+        label="Neovim",
+        command_template="nvim {path}",
+        executable="nvim",
+        launch_mode="blocking",
+    )
+
+    monkeypatch.setattr(
+        "app.opener.subprocess.run",
+        lambda *args, **kwargs: CompletedProcess(args=[], returncode=2),
+    )
+
+    success, message = launch_blocking_option(tmp_path, option)
+
+    assert success is False
+    assert "code 2" in message
+
+
+def test_is_blocking_option_uses_launch_mode() -> None:
+    blocking = OpenWithOption(
+        label="Neovim",
+        command_template="nvim {path}",
+        executable="nvim",
+        launch_mode="blocking",
+    )
+    background = OpenWithOption(
+        label="VS Code",
+        command_template="code {path}",
+        executable="code",
+        launch_mode="background",
+    )
+
+    assert is_blocking_option(blocking) is True
+    assert is_blocking_option(background) is False
+
+
+def test_launch_blocking_option_handles_paths_with_spaces(
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
+) -> None:
+    target_path = tmp_path / "COMPETENCIAS A.LEDO"
+    option = OpenWithOption(
+        label="Neovim",
+        command_template="nvim {path}",
+        executable="nvim",
+        launch_mode="blocking",
+    )
+    captured: dict[str, list[str]] = {}
+
+    def fake_run(command: list[str], check: bool) -> CompletedProcess[object]:
+        captured["command"] = command
+        return CompletedProcess(args=[], returncode=0)
+
+    monkeypatch.setattr("app.opener.subprocess.run", fake_run)
+
+    success, _message = launch_blocking_option(target_path, option)
+
+    assert success is True
+    assert captured["command"] == ["nvim", str(target_path)]

tests/test_post_install.py

@@ -0,0 +1,47 @@
+from pathlib import Path
+
+import pytest
+
+from cd_browser_post_install import main
+
+CD_FUNCTION_SNIPPET = "cd_() {"
+
+
+def test_post_install_handles_eof_without_crashing(
+    monkeypatch: pytest.MonkeyPatch,
+    capsys: pytest.CaptureFixture[str],
+) -> None:
+    monkeypatch.setenv("SHELL", "/bin/zsh")
+    monkeypatch.setattr(
+        "builtins.input", lambda _prompt: (_ for _ in ()).throw(EOFError)
+    )
+
+    main()
+
+    output = capsys.readouterr().out
+    assert "No interactive input detected" in output
+    assert "source ~/.zshrc" in output
+
+
+def test_post_install_adds_cd_function_once(
+    monkeypatch: pytest.MonkeyPatch,
+    tmp_path: Path,
+    capsys: pytest.CaptureFixture[str],
+) -> None:
+    monkeypatch.setenv("SHELL", "/bin/zsh")
+    monkeypatch.setenv("HOME", str(tmp_path))
+
+    responses = iter(["y", "y"])
+    monkeypatch.setattr("builtins.input", lambda _prompt: next(responses))
+
+    main()
+    main()
+
+    profile_path = tmp_path / ".zshrc"
+    content = profile_path.read_text(encoding="utf-8")
+
+    assert content.count(CD_FUNCTION_SNIPPET) == 1
+
+    output = capsys.readouterr().out
+    assert "already exists" in output
+    assert "source ~/.zshrc" in output

tests/test_ui.py

@@ -1,11 +1,18 @@
+import curses
 from pathlib import Path
 
 import pytest
 
 from app.navigator import Navigator, VisibleEntry
 from app.ui import (
+    ESCAPE_KEY,
+    HistoryLine,
     RenderLine,
+    TerminalUI,
+    build_history_lines,
     build_render_lines,
+    build_status_line,
+    clamp_scroll_offset,
     format_entry,
     move_selection,
     open_terminal_streams,
@@ -47,6 +54,19 @@ def test_format_entry_supports_parent_and_tree_indicators(tmp_path: Path) -> Non
     assert format_entry(expanded_child) == "      build"
 
 
+def test_format_entry_marks_files_with_file_indicator(tmp_path: Path) -> None:
+    file_entry = VisibleEntry(
+        name="notes.txt",
+        path=tmp_path / "notes.txt",
+        depth=0,
+        has_children=False,
+        is_expanded=False,
+        is_file=True,
+    )
+
+    assert format_entry(file_entry) == "• notes.txt"
+
+
 def test_build_render_lines_marks_selected_entry(tmp_path: Path) -> None:
     workspace = tmp_path / "workspace"
     workspace.mkdir()
@@ -65,6 +85,391 @@ def test_build_render_lines_marks_selected_entry(tmp_path: Path) -> None:
     ]
 
 
+def test_build_history_lines_marks_selected_history_entry(tmp_path: Path) -> None:
+    first = tmp_path / "first"
+    second = tmp_path / "second"
+
+    assert build_history_lines((first, second), selected_index=1) == [
+        HistoryLine(text=str(first), is_selected=False),
+        HistoryLine(text=str(second), is_selected=True),
+    ]
+
+
+def test_clamp_scroll_offset_keeps_selection_visible_when_moving_down() -> None:
+    assert clamp_scroll_offset(5, scroll_offset=0, visible_count=3, total_count=10) == 3
+
+
+def test_clamp_scroll_offset_keeps_selection_visible_when_moving_up() -> None:
+    assert clamp_scroll_offset(1, scroll_offset=4, visible_count=3, total_count=10) == 1
+
+
+def test_clamp_scroll_offset_returns_zero_when_all_items_fit() -> None:
+    assert clamp_scroll_offset(2, scroll_offset=1, visible_count=5, total_count=3) == 0
+
+
+def test_toggle_history_mode_selects_current_history_entry(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    child = root / "child"
+    root.mkdir()
+    child.mkdir()
+
+    navigator = Navigator(root)
+    navigator.set_selected_index(1)
+    navigator.enter_selected_directory()
+    ui = TerminalUI()
+
+    ui._toggle_history_mode(navigator)
+
+    assert ui._history_mode is True
+    assert ui._history_selected_index == 0
+
+
+def test_history_mode_enter_selects_entry_and_exits(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    first = root / "first"
+    second = root / "second"
+    root.mkdir()
+    first.mkdir()
+    second.mkdir()
+
+    navigator = Navigator(root)
+    navigator.set_selected_index(1)
+    navigator.enter_selected_directory()
+    navigator.go_to_parent_directory()
+    navigator.set_selected_index(2)
+    navigator.enter_selected_directory()
+
+    ui = TerminalUI()
+    ui._toggle_history_mode(navigator)
+    ui._handle_history_key(curses.KEY_DOWN, navigator)
+    ui._handle_history_key(10, navigator)
+
+    assert ui._history_mode is False
+    assert navigator.current_path == root.resolve()
+    assert navigator.selected_index == 0
+
+
+def test_history_mode_renders_most_recent_entry_first(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    first = root / "first"
+    second = root / "second"
+    root.mkdir()
+    first.mkdir()
+    second.mkdir()
+
+    navigator = Navigator(root)
+    navigator.set_selected_index(1)
+    navigator.enter_selected_directory()
+    navigator.go_to_parent_directory()
+    navigator.set_selected_index(2)
+    navigator.enter_selected_directory()
+
+    ui = TerminalUI()
+    ui._toggle_history_mode(navigator)
+    lines, _selected_index = ui._build_history_lines_for_render(
+        navigator.history.entries()
+    )
+
+    assert lines[0].text == str(second.resolve())
+
+
+def test_history_mode_slash_activates_history_filter() -> None:
+    ui = TerminalUI()
+    navigator = Navigator(Path.cwd())
+    ui._history_mode = True
+
+    ui._handle_history_key(ord("/"), navigator)
+
+    assert ui._history_filter_mode is True
+    assert ui._history_filter_query == ""
+
+
+def test_history_filter_enter_selects_filtered_entry_and_exits_history(
+    tmp_path: Path,
+) -> None:
+    root = tmp_path / "root"
+    alpha = root / "alpha"
+    beta = root / "beta"
+    root.mkdir()
+    alpha.mkdir()
+    beta.mkdir()
+
+    navigator = Navigator(root)
+    navigator.set_selected_index(1)
+    navigator.enter_selected_directory()
+    navigator.go_to_parent_directory()
+    navigator.set_selected_index(2)
+    navigator.enter_selected_directory()
+
+    ui = TerminalUI()
+    ui._toggle_history_mode(navigator)
+    ui._history_filter_mode = True
+    ui._history_filter_query = "alpha"
+
+    ui._handle_history_key(10, navigator)
+
+    assert navigator.current_path == alpha.resolve()
+    assert ui._history_mode is False
+    assert ui._history_filter_mode is False
+
+
+def test_history_filter_escape_disables_only_history_filter(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    navigator = Navigator(root)
+    ui = TerminalUI()
+    ui._toggle_history_mode(navigator)
+    ui._history_filter_mode = True
+    ui._history_filter_query = "ro"
+
+    ui._handle_history_key(ESCAPE_KEY, navigator)
+
+    assert ui._history_mode is True
+    assert ui._history_filter_mode is False
+    assert ui._history_filter_query == ""
+
+
+def test_history_mode_toggle_off_keeps_current_directory(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    navigator = Navigator(root)
+    ui = TerminalUI()
+
+    ui._toggle_history_mode(navigator)
+    ui._toggle_history_mode(navigator)
+
+    assert ui._history_mode is False
+    assert navigator.current_path == root.resolve()
+
+
+def test_right_arrow_expands_collapsed_directory(tmp_path: Path) -> None:
+    workspace = tmp_path / "workspace"
+    scripts = workspace / "scripts"
+    build = scripts / "build"
+    workspace.mkdir()
+    scripts.mkdir()
+    build.mkdir()
+
+    navigator = Navigator(workspace)
+    navigator.set_selected_index(1)
+    ui = TerminalUI()
+
+    assert ui._handle_tree_key(curses.KEY_RIGHT, navigator) is None
+    assert navigator.current_path == workspace.resolve()
+    assert [entry.name for entry in navigator.visible_entries] == [
+        "..",
+        "scripts",
+        "build",
+    ]
+
+
+def test_right_arrow_enters_already_expanded_directory(tmp_path: Path) -> None:
+    workspace = tmp_path / "workspace"
+    scripts = workspace / "scripts"
+    build = scripts / "build"
+    workspace.mkdir()
+    scripts.mkdir()
+    build.mkdir()
+
+    navigator = Navigator(workspace)
+    navigator.set_selected_index(1)
+    navigator.expand_selected_directory()
+    ui = TerminalUI()
+
+    assert ui._handle_tree_key(curses.KEY_RIGHT, navigator) is None
+    assert navigator.current_path == scripts.resolve()
+    assert navigator.selected_index == 0
+
+
+def test_left_arrow_goes_to_parent_when_selected_entry_is_collapsed(
+    tmp_path: Path,
+) -> None:
+    parent = tmp_path / "parent"
+    current = parent / "current"
+    child = current / "child"
+    parent.mkdir()
+    current.mkdir()
+    child.mkdir()
+
+    navigator = Navigator(current)
+    navigator.set_selected_index(1)
+    ui = TerminalUI()
+
+    assert ui._handle_tree_key(curses.KEY_LEFT, navigator) is None
+    assert navigator.current_path == parent.resolve()
+    assert navigator.selected_index == 0
+
+
+def test_enter_returns_selected_path_without_navigating(tmp_path: Path) -> None:
+    workspace = tmp_path / "workspace"
+    child = workspace / "child"
+    workspace.mkdir()
+    child.mkdir()
+
+    navigator = Navigator(workspace)
+    navigator.set_selected_index(1)
+    ui = TerminalUI()
+
+    result = ui._handle_tree_key(10, navigator)
+
+    assert result == child.resolve()
+    assert navigator.current_path == workspace.resolve()
+
+
+def test_toggle_files_key_updates_navigator_state(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    (root / "folder").mkdir()
+    (root / "notes.txt").write_text("content", encoding="utf-8")
+
+    navigator = Navigator(root)
+    ui = TerminalUI()
+
+    assert navigator.show_files is False
+    assert ui._handle_tree_key(ord("a"), navigator) is None
+    assert navigator.show_files is True
+
+
+def test_filter_matching_is_case_insensitive(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    (root / "Alpha").mkdir()
+    (root / "beta").mkdir()
+
+    navigator = Navigator(root)
+    ui = TerminalUI()
+    ui._filter_mode = True
+    ui._filter_query = "alp"
+
+    matches = ui._matching_indices(navigator.visible_entries)
+
+    assert matches == [1]
+
+
+def test_build_status_line_shows_filter_off_when_filter_mode_is_disabled(
+    tmp_path: Path,
+) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    navigator = Navigator(root)
+
+    status_line = build_status_line(
+        navigator,
+        filter_mode=False,
+        filter_query="",
+        dev_summary="git:- stack:-",
+    )
+
+    assert "filter: off" in status_line
+
+
+def test_build_status_line_shows_empty_filter_without_off_when_filter_is_active(
+    tmp_path: Path,
+) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    navigator = Navigator(root)
+
+    status_line = build_status_line(
+        navigator,
+        filter_mode=True,
+        filter_query="",
+        dev_summary="git:- stack:-",
+    )
+
+    assert "filter: |" in status_line
+
+
+def test_filter_mode_uses_g_and_g_upper_as_query_characters(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    (root / "alpha").mkdir()
+    (root / "gamma").mkdir()
+
+    navigator = Navigator(root)
+    ui = TerminalUI()
+    ui._filter_mode = True
+
+    assert ui._handle_filter_key(ord("g"), navigator) is None
+    assert ui._handle_filter_key(ord("G"), navigator) is None
+    assert ui._filter_query == "gG"
+
+
+def test_filter_enter_on_directory_navigates_and_exits_filter(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    child = root / "child"
+    root.mkdir()
+    child.mkdir()
+
+    navigator = Navigator(root)
+    ui = TerminalUI()
+    ui._filter_mode = True
+    ui._filter_query = "child"
+
+    result = ui._handle_filter_key(10, navigator)
+
+    assert result is None
+    assert ui._filter_mode is False
+    assert navigator.current_path == child.resolve()
+
+
+def test_filter_enter_on_file_opens_menu_and_exits_filter(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    file_path = root / "notes.txt"
+    file_path.write_text("hello", encoding="utf-8")
+
+    navigator = Navigator(root)
+    navigator.toggle_files()
+    ui = TerminalUI()
+    ui._filter_mode = True
+    ui._filter_query = "notes"
+    opened: dict[str, bool] = {"called": False}
+
+    def fake_open_with_selected(
+        _navigator: Navigator, _stdscr: curses.window | None
+    ) -> None:
+        opened["called"] = True
+
+    monkeypatch.setattr(ui, "_open_with_selected", fake_open_with_selected)
+
+    result = ui._handle_filter_key(10, navigator)
+
+    assert result is None
+    assert ui._filter_mode is False
+    assert opened["called"] is True
+    assert navigator.selected_entry.path == file_path.resolve()
+
+
+def test_end_key_jumps_to_last_entry(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    for name in ("alpha", "beta", "gamma"):
+        (root / name).mkdir()
+
+    navigator = Navigator(root)
+    ui = TerminalUI()
+
+    assert ui._handle_tree_key(curses.KEY_END, navigator) is None
+    assert navigator.selected_index == len(navigator.visible_entries) - 1
+
+
+def test_info_mode_toggles_with_i_and_escape(tmp_path: Path) -> None:
+    root = tmp_path / "root"
+    root.mkdir()
+    navigator = Navigator(root)
+    ui = TerminalUI()
+
+    assert ui._info_mode is False
+    assert ui._handle_tree_key(ord("i"), navigator) is None
+    assert ui._info_mode is True
+
+    ui._handle_info_key(ESCAPE_KEY)
+    assert ui._info_mode is False
+
+
 def test_open_terminal_streams_raises_without_terminal(
     monkeypatch: pytest.MonkeyPatch,
 ) -> None: