herd: pre-trust worker trees for every account (RT-326)

[m4ttheweric]

Claude Code 2.1.283 redrew its folder-trust dialog, and rt's parser only knew the old "Do you trust the files in this folder" layout. Every daemon-spawned claude pane in a folder its account had not trusted yet sat on the dialog and reported trust: none, which is how an account-3 herd worker stalled while an account-2 worker (folder already trusted) went through.

What changed

Parser (lib/daemon/trust-dialog.ts)

• Reads the 2.1.283 layout ("Accessing workspace:", unnumbered options, cursor starting on "No, exit") anchored at the bottom of the screen
• Returns the folder path the dialog names; a wrapped path is never rejoined
• A live dialog whose top has scrolled off is undrivable, so the pane is reported stuck rather than fine
• Old layout and the relocation prompt are unchanged

Driver (lib/daemon/trust-accept.ts)

• New trustsPath predicate: a dialog that names a folder is accepted only for an admitted path, and never without a predicate
• The first admitted path is pinned for the walk
• cwdPath admits a launch cwd and its realpath

Callers

• agent:start (and so herd:spawn) and pane:spawn admit their own cwd
• The watchdog's mid-run accept admits registered worktrees

Also

• Marks rt intercept status agent-safe for rt_verb (separate commit)

Verification

Fixtures come from a live capture of the stuck worker pane (paths sanitized). Touched suites 232/232; tsc --noEmit clean; repo-purity ok. Full bun run test 11382 pass, 6 fail in flavor-takeover and daemon-logdy-config, both untouched by this branch and 19/19 when run alone.

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features
  • Added intercept status to the commands available for agent-safe use.
  • Added support for recognizing Claude Code’s workspace trust prompt and selecting “Yes, I trust this folder” when the displayed folder matches the approved working folder.
• Bug Fixes
  • Trust prompts for unapproved, mismatched, or changing folder paths are no longer automatically accepted, reducing the risk of trusting the wrong folder.
  • Trust prompts without a verifiable folder path are left unanswered rather than accepted.

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ℹ️ Recent review info

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Run ID: 77061f10-c521-4787-a4cf-1f01ba79339f

📥 Commits

Reviewing files that changed from the base of the PR and between b7d573e and 26cc45d.

📒 Files selected for processing (9)

• lib/daemon/__tests__/herd-watchdog-adapters.test.ts
• lib/daemon/__tests__/herd-watchdog.test.ts
• lib/daemon/__tests__/trust-accept.test.ts
• lib/daemon/__tests__/trust-dialog.test.ts
• lib/daemon/__tests__/trust-workspace-fixtures.ts
• lib/daemon/herd-watchdog-adapters.ts
• lib/daemon/herd-watchdog.ts
• lib/daemon/trust-accept.ts
• lib/daemon/trust-dialog.ts

🚧 Files skipped from review as they are similar to previous changes (2)

• lib/daemon/tests/trust-accept.test.ts
• lib/daemon/tests/herd-watchdog-adapters.test.ts

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📝 Walkthrough

Walkthrough

The daemon now parses Claude Code 2.1.283 workspace trust prompts and checks their paths before automatic acceptance. Agent, pane, and watchdog trust flows pass cwd- or worktree-based path checks. The command tree also marks intercept status as agent-safe.

Changes

Workspace trust prompt handling

Layer / File(s)	Summary
Parse workspace trust prompts lib/daemon/trust-dialog.ts, lib/daemon/__tests__/trust-workspace-fixtures.ts, lib/daemon/__tests__/trust-dialog.test.ts	The parser recognizes the workspace dialog, extracts its path, and selects keys from the cursor position. Fixtures and tests cover captured layouts and key selection.
Gate trust acceptance by path lib/daemon/trust-accept.ts, lib/daemon/__tests__/trust-accept.test.ts	driveTrustAccept requires named prompt paths to pass trustsPath and pins the first admitted path across reads. It refuses a later pathless prompt after pinning. cwdPath admits the resolved cwd and its physical path when available.
Wire path predicates into trust flows lib/daemon/handlers/agent.ts, lib/daemon/handlers/pane.ts, lib/daemon/herd-watchdog.ts, lib/daemon/herd-watchdog-adapters.ts, lib/daemon/__tests__/agent-handlers.test.ts, lib/daemon/__tests__/pane-handlers.test.ts, lib/daemon/__tests__/herd-watchdog.test.ts, lib/daemon/__tests__/herd-watchdog-adapters.test.ts	Agent and pane launch flows use cwd-based path predicates. The watchdog passes the job worktree and checks workspace prompt paths against it. Tests cover matching, non-matching, and missing paths.

Agent-safe intercept status

Layer / File(s)	Summary
Mark intercept status agent-safe lib/command-tree-def.ts, lib/__tests__/agent-safe.test.ts	The command definition marks intercept status as agent-safe, and the surface test expects it in the agent-safe command list.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant PaneSpawn
  participant DriveTrustAccept
  participant ReadTrustPrompt
  participant CwdPath
  PaneSpawn->>DriveTrustAccept: pass cwdPath predicate
  DriveTrustAccept->>ReadTrustPrompt: read workspace prompt
  ReadTrustPrompt-->>DriveTrustAccept: return prompt path and keys
  DriveTrustAccept->>CwdPath: check prompt path
  CwdPath-->>DriveTrustAccept: return path admission result
  DriveTrustAccept-->>PaneSpawn: send acceptance keys when admitted

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Merge Risk: ⚪ Minimal · up to 26cc4

No actionable issue remains in the reviewed trust-dialog and command changes; the PR is mergeable after normal checks.

Security Architecture Review

Security architecture risk: 🟡 Moderate · up to 26cc4

A resumed worker can retain a provisioned-tree marker while moving to a caller-supplied folder. If mid-run automatic acceptance is enabled, the daemon may trust that folder even though it did not provision it. The setting is off by default, and who may request such a respawn remains uncertain.

Retained concerns

• Medium · security · inferred: Mid-run trust acceptance can treat a respawned job’s retained tree marker as proof that its replacement, caller-supplied worktree was provisioned by the daemon. Unlike the prior registry-based check, the new path predicate can then admit that unregistered folder.

Security review details

Security Blast Radius

• inferred — The conditional exposure is a trust grant for a folder reachable by the selected Claude account through a herd pane. The evidence does not establish remote invocation, cross-account privilege gain, or the external trust store’s persistence semantics.

Security Findings and Attack Paths

• inferred — A caller able to respawn an existing provisioned job with --dir can leave its tree marker non-null while changing its recorded worktree. With mid-run acceptance enabled, a matching dialog for that replacement path can reach the acceptance key without the prior registry-membership check. Which identities can make that spawn request is unresolved.

Trust Boundaries and Controls

• observed — Exact path matching, in-walk pinning, a missing-path refusal, and the off-by-default watchdog gate constrain automatic acceptance. None of those checks revalidates that a respawned job’s worktree belongs to its retained tree marker.

Resilience and Maintainability Implications

• inferred — Path pinning lasts for one driver call, not across a respawn or retry. After Enter, an unreadable pane produces an unchecked result, so the available evidence cannot establish whether an earlier external trust grant persisted before recovery.

Hardening Proposals

• proposed — Clear the provisioned-tree marker when a respawn selects --dir, or require current registry ownership of the recorded worktree before the watchdog sends acceptance keys. Verify caller authorization separately before treating job-row contents as an ownership assertion.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 35.71% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 14 functions across 15 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: pre-trusting worker trees for all accounts. It is specific, concise, and consistent with the pull request objectives.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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lib/daemon/__tests__/herd-watchdog-adapters.test.ts

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lib/daemon/__tests__/herd-watchdog.test.ts

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lib/daemon/__tests__/trust-accept.test.ts

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
In @lib/daemon/herd-watchdog-adapters.ts:
- Line 182: Update the trustsPath callback to accept either an exact
findTreeByPath match or a match by canonical realpath among registered trees.
Add a boolean findTreeByRealpath helper that handles realpathSync errors without
disrupting trust checks.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: ce6c3464-4e23-4b0e-9b44-ad5accb8e066

📥 Commits

Reviewing files that changed from the base of the PR and between 3f92f84 and b7d573e.

📒 Files selected for processing (13)

• lib/__tests__/agent-safe.test.ts
• lib/command-tree-def.ts
• lib/daemon/__tests__/agent-handlers.test.ts
• lib/daemon/__tests__/herd-watchdog-adapters.test.ts
• lib/daemon/__tests__/pane-handlers.test.ts
• lib/daemon/__tests__/trust-accept.test.ts
• lib/daemon/__tests__/trust-dialog.test.ts
• lib/daemon/__tests__/trust-workspace-fixtures.ts
• lib/daemon/handlers/agent.ts
• lib/daemon/handlers/pane.ts
• lib/daemon/herd-watchdog-adapters.ts
• lib/daemon/trust-accept.ts
• lib/daemon/trust-dialog.ts

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