docs(SRVKP-11820): add AGENTS.md and project skills

Adds tooling and documentation to support agentic workflows:

- AGENTS.md: minimal context file following agent-readiness
  principles (single-command tests, fast single-package lint,
  conventions, architecture, InstallerSet details, skills)
- .claude/skills/: commit-message and release-notes skills
  adapted from pipelines-as-code; PAC-specific references
  updated for the Tekton Operator project
- .agents/skills/: same skills in Cursor agent format
- .gitlint: commit message linting config with dependabot
  exclusion

Signed-off-by: Jawed khelil <jkhelil@redhat.com>
Assisted-by: Claude Sonnet 4.6 (via Cursor)
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: jkhelil

.agents/skills

@@ -0,0 +1 @@
+../.claude/skills

.claude/.gitignore

@@ -0,0 +1 @@
+*.local.json

.claude/skills/commit-message/SKILL.md

@@ -0,0 +1,327 @@
+---
+name: commit-message
+description: This skill should be used when the user asks to "create a commit", "generate commit message", "commit changes", "make a commit", mentions "conventional commits", or discusses commit message formatting. Provides guided workflow for creating properly formatted commit messages with line length validation and required trailers.
+version: 0.2.0
+---
+
+# Conventional Commit Message Creation
+
+Create properly formatted conventional commit messages following project standards with line length validation and required trailers.
+
+## Purpose
+
+Generate commit messages that:
+
+- Follow conventional commits format (`type(scope): description`)
+- Use component names or GitHub issue numbers as scope
+- Respect line length limits (50 for subject, 72 for body)
+- Include required trailers (Signed-off-by, Co-authored-by)
+- Pass gitlint validation
+
+## Quick Workflow
+
+1. **Analyze changes**: Run git status and git diff to understand modifications
+2. **Determine scope**: Use component name from changed files, or GitHub issue number if available
+3. **Generate message**: Create conventional commit message with proper formatting
+4. **Add trailers**: Include Signed-off-by and Co-authored-by trailers
+5. **Confirm with user**: Display message and wait for approval before committing
+
+**CRITICAL**: Never commit without explicit user confirmation.
+
+## Conventional Commit Format
+
+### Structure
+
+```text
+<type>(<scope>): <description>
+
+[optional body]
+
+Signed-off-by: <name> <email>
+Co-authored-by: <model-name> (via Cursor)
+```text
+
+### Type Selection
+
+Choose the appropriate commit type based on changes:
+
+| Type | Description | Example |
+| ------ | ------------- | --------- |
+| `feat` | New features | `feat(tektonpipeline): add HA support` |
+| `fix` | Bug fixes | `fix(reconciler): resolve race condition` |
+| `docs` | Documentation | `docs(README): update installation steps` |
+| `refactor` | Code refactoring | `refactor(installerset): simplify logic` |
+| `test` | Test changes | `test(tektonchain): add unit tests` |
+| `chore` | Maintenance | `chore(deps): update go dependencies` |
+| `build` | Build system | `build(Makefile): add vendor target` |
+| `ci` | CI/CD changes | `ci(github): add golangci-lint action` |
+| `perf` | Performance | `perf(cache): optimize lookup speed` |
+| `style` | Code style | `style(format): run fumpt formatter` |
+| `revert` | Revert commit | `revert: undo breaking API change` |
+
+For complete type reference, see `references/commit-types.md`.
+
+### Scope Rules
+
+#### Priority 1: Component from changed files
+
+Analyze staged files to identify the primary component:
+
+```bash
+# Get list of staged files
+git diff --cached --name-only
+```text
+
+| File pattern | Scope | Example commit |
+| ------------ | ----- | -------------- |
+| `pkg/reconciler/kubernetes/tektonpipeline/*` | `tektonpipeline` | `fix(tektonpipeline): resolve status update` |
+| `pkg/reconciler/kubernetes/tektonchain/*` | `tektonchain` | `feat(tektonchain): add OCI support` |
+| `pkg/reconciler/openshift/*` | component name | `fix(tektondashboard): fix route creation` |
+| `pkg/reconciler/common/*` | `common` | `refactor(common): simplify installerset` |
+| `pkg/apis/*` | `api` | `feat(api): add new CRD field` |
+| `docs/*` | `docs` or filename | `docs(README): update steps` |
+| `test/*` | component being tested | `test(tektonchain): add unit tests` |
+| `cmd/*` | command name | `feat(operator): add new flag` |
+| Root files | filename | `chore(Makefile): add target` |
+| `AGENTS.md`, `CLAUDE.md` | `docs` | `docs(AGENTS.md): update conventions` |
+
+#### Priority 2: GitHub issue number (optional)
+
+If the work is tracked in a GitHub issue and the user provides one, it can be used as the scope:
+
+```text
+# Branch: fix-123-installerset-race
+# Scope: #123 or component name
+# Result: fix(installerset): resolve race condition
+
+Fixes #123
+```text
+
+Add `Fixes #NNN` or `Closes #NNN` in the commit body (not the scope) — this is the standard GitHub convention for auto-closing issues.
+
+#### Priority 3: Ask user
+
+If changed files span multiple components or scope is unclear, ask the user which component is the primary focus.
+
+## Line Length Requirements
+
+### Subject Line
+
+- **Target**: 50 characters maximum
+- **Hard limit**: 72 characters (gitlint enforced)
+- **Format**: `type(scope): description` counts toward limit
+- **Tips**: Use present tense, no period at end
+
+```text
+# Good (44 chars)
+feat(tektonpipeline): add HA support
+
+# Too long - will fail gitlint
+feat(tektonpipeline): add comprehensive high-availability support for pipeline controller
+```text
+
+### Body
+
+- **Wrap at 72 characters per line**
+- **Blank line** required between subject and body
+- **Content**: Explain why, not what (code shows what)
+- **Format**: Wrap manually or use heredoc in git commit
+
+```text
+feat(tektonpipeline): add HA support
+
+Enable leader election in the pipeline reconciler to support
+high-availability deployments. This prevents split-brain issues
+when multiple operator replicas are running.
+
+Signed-off-by: Developer Name <developer@example.com>
+Co-authored-by: Claude Sonnet 4.5 (via Cursor)
+```text
+
+## Required Trailers
+
+### Signed-off-by
+
+**Always include**: `Signed-off-by: <name> <email>`
+
+This certifies the Developer Certificate of Origin (DCO) — required by tektoncd upstream.
+
+**Detection priority order**:
+
+1. Environment variables: `$GIT_AUTHOR_NAME` and `$GIT_AUTHOR_EMAIL`
+2. Git config: `git config user.name` and `git config user.email`
+3. If neither configured, ask user to provide details
+
+```bash
+# Check environment variables first
+echo "$GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL>"
+
+# Fallback to git config
+git config user.name
+git config user.email
+```text
+
+For complete detection logic, see `references/trailer-detection.md`.
+
+### Co-authored-by
+
+**Always include**: `Co-authored-by: <model-name> (via Cursor)`
+
+**Format examples**:
+
+```text
+Co-authored-by: Claude Sonnet 4.5 (via Cursor)
+Co-authored-by: Claude Opus 4.5 (via Cursor)
+```text
+
+Use the actual model name (Claude Sonnet 4.5, Claude Opus 4.5, etc.).
+
+## User Confirmation Requirement
+
+**CRITICAL RULE**: Always ask for user confirmation before executing `git commit`.
+
+### Confirmation Workflow
+
+1. **Generate** the commit message following all rules above
+2. **Display** the complete message to the user with separator
+3. **Ask**: "Should I commit with this message? (y/n)"
+4. **Wait** for user response
+5. **Commit** only if user confirms (yes/y/affirmative)
+
+### Example Interaction
+
+```text
+Generated commit message:
+---
+feat(tektonchain): add OCI bundle support
+
+Enable storing Tekton Chains signatures in OCI registries. This
+allows signing artifacts without requiring a separate storage
+backend.
+
+Signed-off-by: Developer Name <developer@example.com>
+Co-authored-by: Claude Sonnet 4.5 (via Cursor)
+---
+
+Should I commit with this message? (y/n)
+```text
+
+Wait for user response before proceeding.
+
+## Commit Execution
+
+Use heredoc format for proper multi-line handling:
+
+```bash
+git commit -m "$(cat <<'EOF'
+feat(tektonchain): add OCI bundle support
+
+Enable storing Tekton Chains signatures in OCI registries.
+
+Signed-off-by: Developer Name <developer@example.com>
+Co-authored-by: Claude Sonnet 4.5 (via Cursor)
+EOF
+)"
+```text
+
+**Never use**:
+
+- `--no-verify` (skips pre-commit hooks)
+- `--no-gpg-sign` (skips signing)
+- `--amend` (unless explicitly requested and safe)
+
+## Complete Examples
+
+### Feature with component scope
+
+```text
+feat(tektonpipeline): add HA leader election
+
+Enable leader election in the pipeline reconciler to support
+high-availability deployments with multiple operator replicas.
+
+Signed-off-by: Jane Developer <jane@example.com>
+Co-authored-by: Claude Sonnet 4.5 (via Cursor)
+```text
+
+### Bug fix closing a GitHub issue
+
+```text
+fix(installerset): resolve concurrent reconcile panic
+
+Prevent nil pointer dereference when two reconcile loops run
+concurrently on the same InstallerSet object.
+
+Fixes #789
+
+Signed-off-by: John Developer <john@example.com>
+Co-authored-by: Claude Sonnet 4.5 (via Cursor)
+```text
+
+### Documentation update
+
+```text
+docs(AGENTS.md): update architecture conventions
+
+Add InstallerSet naming patterns and clarify platform split
+rules for contributors.
+
+Signed-off-by: Jane Developer <jane@example.com>
+Co-authored-by: Claude Sonnet 4.5 (via Cursor)
+```text
+
+### Breaking change
+
+```text
+feat(api)!: remove deprecated TektonConfig fields
+
+Remove fields deprecated in v0.60 from TektonConfig spec.
+Operators upgrading from v0.60 must migrate before upgrading.
+
+BREAKING CHANGE: Removed spec.targetNamespace and spec.profile
+from TektonConfig. Use spec.config instead. See migration guide.
+
+Signed-off-by: John Developer <john@example.com>
+Co-authored-by: Claude Sonnet 4.5 (via Cursor)
+```text
+
+## Gitlint Integration
+
+This project uses gitlint to enforce commit message format. Ensure all commit messages pass gitlint validation.
+
+**Common gitlint rules**:
+
+- Conventional commit format required
+- Subject line length limits (50 soft, 72 hard)
+- Required trailers (Signed-off-by)
+- No trailing whitespace
+- Body line wrapping at 72 characters
+
+For complete gitlint rules, see `references/gitlint-rules.md`.
+
+## Auto-Detection Summary
+
+When generating commit messages:
+
+1. Run `git status` (without -uall flag)
+2. Run `git diff` for staged and unstaged changes
+3. Identify primary component from staged file paths
+4. If scope unclear, ask user
+5. If user mentions a GitHub issue number, add `Fixes #NNN` to body
+6. Analyze staged files to determine commit type
+7. Generate appropriate scope and description
+8. Detect author info from environment variables or git config
+9. Ensure subject line is ≤50 characters (max 72)
+10. Wrap body text at 72 characters per line
+11. Add required trailers (Signed-off-by and Co-authored-by)
+12. Format according to conventional commits standard
+13. **Display message and ask for user confirmation**
+14. Only commit after receiving confirmation
+
+## Additional Resources
+
+For detailed information:
+
+- **`references/commit-types.md`** - Complete commit type reference with descriptions
+- **`references/gitlint-rules.md`** - Gitlint validation rules and configuration
+- **`references/trailer-detection.md`** - Author detection logic and priority order