feat(agents): add crush adapter

[yyovil]

Adds the crush 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
5. feat(agents): add agy adapter #123
6. feat(agents): add crush adapter #124 👈 current
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 a new Crush agent adapter following the same structure as the existing codex and agy adapters: launch/restore commands, a no-op hooks layer (pending native Crush hook support), and registration in the adapter registry and wiring test.

• crush.go correctly omits --session on launch so Crush can mint its own native session ID, and gates GetRestoreCommand on MetadataKeyAgentSessionID being populated — consistent with how other no-hook adapters are expected to evolve.
• hooks.go stubs all three hook methods as no-ops with context guards, and activity.go provides the same stub pattern for DeriveActivityState, though that function is not yet wired into activitydispatch/dispatch.go unlike every other adapter's equivalent.

Confidence Score: 5/5

Safe to merge; the adapter is correctly scoped as a launch-only stub with no hooks, and the restore path is properly gated.

All changed code is new and self-contained. The launch/restore/manifest logic is straightforward and well-tested. Hooks and activity state are intentional no-ops with clear TODO markers for future work. The one gap — crush.DeriveActivityState not yet registered in the dispatch table — has no runtime consequence until hook support is added.

activitydispatch/dispatch.go will need a "crush" entry added before Crush hook support ships.

Important Files Changed

Filename	Overview
backend/internal/adapters/agent/crush/crush.go	Core crush adapter: launch/restore/sessionInfo all correct; restore correctly gates on MetadataKeyAgentSessionID; binary resolver mirrors codex/agy patterns faithfully.
backend/internal/adapters/agent/crush/hooks.go	All three hook methods are correctly stubbed as no-ops with ctx.Err guards; consistent with the documented pending hook support.
backend/internal/adapters/agent/crush/activity.go	No-op DeriveActivityState correctly returns ("", false); defined for future use but not yet wired into activitydispatch/dispatch.go.
backend/internal/adapters/agent/crush/crush_test.go	Thorough test coverage for launch/restore/sessionInfo/manifest/hooks; restore tests correctly verify the MetadataKeyAgentSessionID gating behaviour.
backend/internal/adapters/agent/crush/activity_test.go	Minimal test verifying no-op behaviour of DeriveActivityState; appropriate scope for the current implementation.
backend/internal/adapters/agent/registry/registry.go	crush.New() correctly added to the Constructors slice alongside the other adapters.
backend/internal/daemon/wiring_test.go	HarnessCrush/"crush" resolver test case added correctly; verifies end-to-end wiring.

Sequence Diagram

sequenceDiagram
    participant AO as AO Session Manager
    participant Registry as adapter/registry
    participant Crush as crush.Plugin
    participant Binary as crush binary

    AO->>Registry: Constructors()
    Registry-->>AO: [..., crush.New()]

    AO->>Crush: GetLaunchCommand(LaunchConfig)
    Crush->>Crush: crushBinary() — resolve + cache path
    Crush-->>AO: [crush, --cwd, path, (--yolo), --, prompt]

    AO->>Binary: exec(cmd)
    Note over Binary: Crush mints its own native session ID (no --session on launch)

    AO->>Crush: GetRestoreCommand(RestoreConfig)
    Note over Crush: Reads MetadataKeyAgentSessionID from session metadata
    alt agentSessionID present
        Crush-->>AO: "[crush, --cwd, path, --session, id], ok=true"
    else agentSessionID absent
        Crush-->>AO: "nil, ok=false"
    end

    AO->>Crush: GetAgentHooks / AreHooksInstalled
    Note over Crush: No-op — hooks not yet supported
    Crush-->>AO: (nil / false)

Loading

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