feat(agents): add cline adapter

[yyovil]

Adds the cline harness, stacked on #119 (agent platform). Adapter package + Constructors() registration + resolver test. Includes its own activity deriver.

🤖 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
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 👈 current
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 Cline headless agent adapter: binary resolution, launch/restore command building, workspace-local hook installation, activity derivation, and registration in the adapter registry and activity-dispatch map.

• cline.go / hooks.go / activity.go form the complete adapter: atomic hook-script writes, idempotent install/uninstall that preserves user-authored hooks, and a four-event activity deriver wired into the existing dispatch table.
• registry.go and activitydispatch/dispatch.go each receive a single-line registration; wiring_test.go extends the resolver smoke-test to cover domain.HarnessCline.

Confidence Score: 5/5

Safe to merge — the adapter is well-structured, the AcceptEdits inversion noted in a previous review has been corrected, and the remaining notes are comment-level clarifications with no runtime impact.

The adapter correctly resolves the binary, builds launch/restore argv, writes atomic hook scripts, and derives activity state. The hook idempotency and user-hook preservation logic are tested end-to-end. The two findings are a misleading inline comment and a note about Cline CLI's binary --auto-approve flag making AcceptEdits and Auto equivalent — neither affects runtime correctness.

backend/internal/adapters/agent/cline/cline.go — the appendApprovalFlags comment for --yolo and the AcceptEdits/Auto equivalence are worth a second glance before merging.

Important Files Changed

Filename	Overview
backend/internal/adapters/agent/cline/cline.go	Core adapter — binary resolution, launch/restore commands, SessionInfo, and appendApprovalFlags. The AcceptEdits inversion from a previous review has been fixed; a misleading comment remains on the --yolo arm.
backend/internal/adapters/agent/cline/hooks.go	Installs/uninstalls workspace-local hook scripts; atomic write, idempotent install, user-hook preservation all implemented correctly.
backend/internal/adapters/agent/cline/activity.go	Activity deriver maps the four AO hook sub-commands to the expected domain states; fallback to the lifecycle reaper is documented.
backend/internal/adapters/agent/cline/cline_test.go	Comprehensive tests covering launch flags, restore command, session info, hook install/uninstall idempotency, and context cancellation.
backend/internal/adapters/agent/registry/registry.go	cline.New() appended to Constructors(); clean, single-edit registration pattern.
backend/internal/adapters/agent/activitydispatch/dispatch.go	"cline" token registered to cline.DeriveActivityState; consistent with every other adapter in the map.
backend/internal/daemon/wiring_test.go	domain.HarnessCline added to the resolver smoke-test table; validates end-to-end wiring from harness token to registered adapter.

Sequence Diagram

sequenceDiagram
    participant AO as AO Daemon
    participant Plugin as cline.Plugin
    participant FS as Filesystem
    participant Cline as Cline CLI
    participant Dispatch as activitydispatch

    AO->>Plugin: GetAgentHooks(WorkspaceHookConfig)
    Plugin->>FS: atomicWriteFile(TaskStart, UserPromptSubmit, PreToolUse, TaskCancel)
    FS-->>Plugin: ok
    AO->>Plugin: GetLaunchCommand(LaunchConfig)
    Plugin-->>AO: cline --json flags -- prompt
    AO->>Cline: exec
    Cline->>FS: TaskStart hook
    FS->>Dispatch: ao hooks cline session-start
    Dispatch-->>FS: ActivityActive
    FS-->>Cline: cancel false
    Cline->>FS: PreToolUse hook
    FS->>Dispatch: ao hooks cline permission-request
    Dispatch-->>FS: ActivityWaitingInput
    FS-->>Cline: cancel false
    Cline->>FS: TaskCancel hook
    FS->>Dispatch: ao hooks cline stop
    Dispatch-->>FS: ActivityIdle
    FS-->>Cline: cancel false

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