chore: add PR template and bug report issue template (#574)

* chore: add PR template and bug report issue template

Standardize PR descriptions and bug reports with structured templates
to improve consistency across contributors.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* chore: simplify PR template — replace milestone/slice with target branch

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* chore: rename section to 'Release context'

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,107 @@
+name: Bug Report
+description: Report a bug in GSD
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for reporting a bug! Please fill out the sections below so we can reproduce and fix it.
+
+  - type: input
+    id: version
+    attributes:
+      label: GSD version
+      description: Run `gsd --version` or check `package.json`
+      placeholder: "e.g., 2.15.0"
+    validations:
+      required: true
+
+  - type: dropdown
+    id: area
+    attributes:
+      label: Affected area
+      options:
+        - Auto-mode / dispatch loop
+        - TUI / terminal display
+        - Planning / roadmap
+        - Phase execution
+        - Git / worktree isolation
+        - Hook orchestration
+        - State management
+        - AI provider integration
+        - CLI / commands
+        - Other
+    validations:
+      required: true
+
+  - type: textarea
+    id: description
+    attributes:
+      label: What happened?
+      description: A clear description of the bug.
+      placeholder: "When I run X, Y happens instead of Z."
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+      description: What should have happened instead?
+    validations:
+      required: true
+
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: Steps to reproduce
+      description: Minimal steps to trigger the bug.
+      placeholder: |
+        1. Run `gsd ...`
+        2. Select option ...
+        3. See error
+    validations:
+      required: true
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: Error output / logs
+      description: Paste any error messages or relevant log output.
+      render: shell
+
+  - type: dropdown
+    id: os
+    attributes:
+      label: Operating system
+      options:
+        - macOS
+        - Linux
+        - Windows
+        - Other
+    validations:
+      required: true
+
+  - type: input
+    id: node-version
+    attributes:
+      label: Node.js version
+      description: Run `node --version`
+      placeholder: "e.g., v22.4.0"
+
+  - type: dropdown
+    id: ai-provider
+    attributes:
+      label: AI provider (if relevant)
+      options:
+        - Anthropic (Claude)
+        - OpenRouter
+        - OpenAI-compatible
+        - Other
+        - N/A
+
+  - type: textarea
+    id: context
+    attributes:
+      label: Additional context
+      description: Anything else — screenshots, config snippets, related issues.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,49 @@
+## Summary
+<!-- What does this PR do? 1-3 bullet points. -->
+
+-
+
+## Motivation
+<!-- Why is this change needed? Link issues if applicable. -->
+
+Closes #
+
+## Change type
+<!-- Check one: -->
+- [ ] `feat` — New feature or capability
+- [ ] `fix` — Bug fix
+- [ ] `refactor` — Code restructuring (no behavior change)
+- [ ] `test` — Adding or updating tests
+- [ ] `docs` — Documentation only
+- [ ] `chore` — Build, CI, or tooling changes
+
+## Scope
+<!-- Which packages/areas does this touch? Check all that apply. -->
+- [ ] `pi-tui` — Terminal UI
+- [ ] `pi-ai` — AI/LLM layer
+- [ ] `pi-agent-core` — Agent orchestration
+- [ ] `pi-coding-agent` — Coding agent
+- [ ] `gsd extension` — GSD workflow (`src/resources/extensions/gsd/`)
+- [ ] `native` — Native bindings
+- [ ] `ci/build` — Workflows, scripts, config
+
+## Breaking changes
+<!-- Does this change any public API, CLI behavior, config format, or file structure? -->
+- [ ] No breaking changes
+- [ ] Yes — describe below:
+
+## Test plan
+<!-- How was this tested? Check all that apply. -->
+- [ ] Unit tests added/updated (`npm run test:unit`)
+- [ ] Integration tests added/updated (`npm run test:integration`)
+- [ ] Manual testing — describe steps:
+- [ ] No tests needed — explain why:
+
+## Rollback plan
+<!-- If this causes issues in production, how do we revert safely? -->
+- [ ] Safe to revert (no migrations, no state changes)
+- [ ] Requires steps — describe:
+
+## Release context
+<!-- What branch does this PR target? -->
+- **Target**: <!-- e.g., milestone/2.15.x or main -->