feat(agents): add amp adapter

[yyovil]

Adds the amp harness, stacked on #119 (agent platform). Adapter package + Constructors() registration + resolver test.

🤖 Generated with Claude Code

Stack

1. feat(agents): agent platform — registry, activity hooks, harness allowlist #119
2. feat(agents): add grok adapter #120
3. feat(agents): add droid adapter #121
4. feat(agents): add amp adapter #122 👈 current
5. feat(agents): add agy adapter #123
6. feat(agents): add crush adapter #124
7. feat(agents): add aider adapter #125
8. feat(agents): add cursor adapter #126
9. feat(agents): add qwen adapter #127
10. feat(agents): add copilot adapter #128
11. feat(agents): add goose adapter #129
12. feat(agents): add auggie adapter #130
13. feat(agents): add continue adapter #131
14. feat(agents): add devin adapter #132
15. feat(agents): add cline adapter #133
16. feat(agents): add kimi adapter #134
17. feat(agents): add kiro adapter #135
18. feat(agents): add kilocode adapter #136
19. feat(agents): add vibe adapter #137
20. feat(agents): add pi adapter #138
21. feat(agents): add autohand adapter #139

[greptile-apps]

Greptile Summary

Adds the amp agent adapter following the same pattern as the existing droid, grok, and opencode adapters. The adapter is registered in registry.Constructors() and the resolver smoke-test in wiring_test.go is updated to assert HarnessAmp → "amp".

• amp.go: Implements adapters.Adapter + ports.Agent with GetLaunchCommand (using --permission-mode / --append-system-prompt[-file] / -- separator), GetRestoreCommand (via --resume <agentSessionID>), and intentional no-ops for GetAgentHooks and SessionInfo pending a future Amp TypeScript plugin.
• amp_test.go: Covers every public method, all three permission modes, both system-prompt paths, and context-cancellation for every method.
• Registry + wiring: Single-line additions to Constructors() and the resolver test table.

Confidence Score: 5/5

Safe to merge — the adapter is a well-scoped addition that follows the established patterns without touching any shared logic paths.

The adapter correctly implements every interface method with context guards, the binary-caching mutex is used consistently, all permission modes are mapped, and the test suite covers every method including context-cancellation. No issues found in the changed files or their direct integration points.

No files require special attention.

Important Files Changed

Filename	Overview
backend/internal/adapters/agent/amp/amp.go	New adapter implementing the full ports.Agent interface; follows the established droid/grok pattern with correct mutex-guarded binary caching, context guards on all methods, and a clear fallback to the bare "amp" name when the binary is not found.
backend/internal/adapters/agent/amp/amp_test.go	Comprehensive test suite covering all methods, permission-mode mapping, system-prompt prioritisation, and context-cancellation for every interface method including GetLaunchCommand.
backend/internal/adapters/agent/registry/registry.go	Single-line addition of amp.New() to Constructors(); no other logic changed.
backend/internal/daemon/wiring_test.go	Adds the HarnessAmp → "amp" entry to the resolver smoke-test table; correctly validates end-to-end wiring from harness constant through registry to adapter manifest ID.

_{Reviews (2): Last reviewed commit: "feat(agents): add amp adapter" | Re-trigger Greptile}