fix(priming): reduce AGENTS.md to bootstrap pointer

AGENTS.md had grown to 50 lines (above the 20-line bootstrap pointer
threshold) after dependency management docs were added in commit 14085db3.

The "Landing the Plane" and "Dependency Management" content belongs in
role templates (injected by gt prime), not in the on-disk bootstrap pointer.

This completes the fix for #316 - the AGENTS.md issue was caused by the
source repo having a large AGENTS.md that got cloned into rigs.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

AGENTS.md

@@ -4,47 +4,6 @@ See **CLAUDE.md** for complete agent context and instructions.
 
 This file exists for compatibility with tools that look for AGENTS.md.
 
-## Landing the Plane (Session Completion)
+> **Recovery**: Run `gt prime` after compaction, clear, or new session
 
-**When ending a work session**, you MUST complete ALL steps below. Work is NOT complete until `git push` succeeds.
+Full context is injected by `gt prime` at session start.
-
-**MANDATORY WORKFLOW:**
-
-1. **File issues for remaining work** - Create issues for anything that needs follow-up
-2. **Run quality gates** (if code changed) - Tests, linters, builds
-3. **Update issue status** - Close finished work, update in-progress items
-4. **PUSH TO REMOTE** - This is MANDATORY:
-   ```bash
-   git pull --rebase
-   bd sync
-   git push
-   git status  # MUST show "up to date with origin"
-   ```
-5. **Clean up** - Clear stashes, prune remote branches
-6. **Verify** - All changes committed AND pushed
-7. **Hand off** - Provide context for next session
-
-**CRITICAL RULES:**
-- Work is NOT complete until `git push` succeeds
-- NEVER stop before pushing - that leaves work stranded locally
-- NEVER say "ready to push when you are" - YOU must push
-- If push fails, resolve and retry until it succeeds
-
-## Dependency Management
-
-Periodically check for outdated dependencies:
-
-```bash
-go list -m -u all | grep '\['
-```
-
-Update direct dependencies:
-
-```bash
-go get <package>@latest
-go mod tidy
-go build ./...
-go test ./...
-```
-
-Check release notes for breaking changes before major version bumps.