feat(root): enhance commit generation with context-aware features

- Add shell completion support for bash/zsh/fish via `devgen --install-completion`
- Introduce `devgen commit undo` to revert the last AI-generated commit while preserving staged changes
- Implement context-aware commit generation by analyzing project manifests (`package.json`, `pyproject.toml`, etc.) and lock files for accurate dependency updates
- Add support for custom Jinja2 templates in `~/.devgen.yaml` with `custom_template` configuration
- Update documentation to reflect new features and provide template variable reference

This release significantly improves commit accuracy by leveraging project context and offers greater customization through templates and shell integration.
```

README.md

@@ -20,7 +20,7 @@
 ## ⚡ Why DevGen?
 
 **🧠 AI Brain**
-Semantic commit messages powered by Gemini, OpenAI, Claude, HuggingFace, and OpenRouter. It reads your diffs and understands your code.
+Semantic, context-aware commit messages powered by Gemini, OpenAI, Claude, HuggingFace, and OpenRouter. It reads your diffs, identifies project manifests, and understands your code.
 
 **🚀 Battle Tested**
 Generates **Conventional Commits** and **Semantic Versioning** compliant changelogs that actually make sense.
@@ -47,6 +47,9 @@ uv tool install devgen-cli
 
 # Standard pip install
 pip install devgen-cli
+
+# Enable Shell Completion (bash/zsh/fish)
+devgen --install-completion
 ```
 
 ## 🚀 Quick Start
@@ -80,8 +83,18 @@ devgen commit run --dry-run
 
 # Commit and push in one go
 devgen commit run --push
+
+# Made a mistake? Undo the last AI commit and keep changes staged
+devgen commit undo
 ```
 
+### 🧠 Context Awareness
+DevGen isn't just looking at the code changes; it's looking at the big picture. It automatically detects and analyzes:
+- **Manifests**: `package.json`, `pyproject.toml`, `go.mod`, `Cargo.toml`, etc.
+- **Lock Files**: `uv.lock`, `package-lock.json`, `poetry.lock`, etc.
+
+This allows the AI to understand *exactly* which library versions were updated, leading to hyper-accurate dependency commit messages.
+
 ### 📝 Changelogs & Release Notes
 
 Turn your git history into beautiful, readable documentation.
@@ -114,7 +127,22 @@ Your settings live in `~/.devgen.yaml`. You can tweak your AI provider, model, a
 | :--------- | :----------------------------------------------------------- |
 | `provider` | `gemini`, `openai`, `anthropic`, `huggingface`, `openrouter` |
 | `model`    | Specific model name (e.g., `gemini-2.5-flash`, `gpt-4o`)     |
-| `emoji`    | Enable/disable gitmojis in commits (`true`/`false`)          |
+| `emoji`           | Enable/disable gitmojis in commits (`true`/`false`)           |
+| `custom_template` | Custom Jinja2 template for commit messages.                   |
+
+### 🎨 Custom Templates
+You can define your own commit message structure in `~/.devgen.yaml`. Use `devgen config info` to see available variables like `{{ group_name }}`, `{{ diff_text }}`, and `{{ context }}`.
+
+Example:
+```yaml
+custom_template: |
+  {{ group_name }}: {{ diff_text }}
+  ---
+  Manifests: {{ context }}
+```
+
+> [!TIP]
+> Use `devgen config info` to see a full list of available variables and a template tip!
 
 ## 🤝 Contributing
 

TODO.md

@@ -9,8 +9,8 @@ This document outlines future improvements, features, and technical debt for `de
 - [ ] **Improved Gitignore Detection**: Auto-detect project type (Python, Node, Go) and suggest relevant `.gitignore` templates during `devgen gitignore run`.
 
 ## 🤖 AI & Intelligence
-- [ ] **Custom Prompts**: Allow users to define their own Jinja2 templates for commits in the config file.
-- [ ] **Context-Aware Commits**: Send the manifest file (`package.json`, `pyproject.toml`) to the AI to provide better context for dependency changes.
+- [x] **Custom Prompts**: Allow users to define their own Jinja2 templates for commits in the config file(~/.devgen.yaml).
+- [x] **Context-Aware Commits**: Send the manifest file (`package.json`, `pyproject.toml`) to the AI to provide better context for dependency changes.
 - [ ] **Token Usage Dashboard**: Add a `devgen config tokens` command to estimate or track AI token consumption.
 - [ ] **More Providers**: Add support for **Mistral**, **Cohere**, and **Groq** for faster/cheaper generations.