subagent-read-stale-worktree-needs-head-pin SKILL.md skillA
subagent-read-stale-worktree-needs-head-pin from wan-huiyan/agent-traffic-control is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add wan-huiyan/agent-traffic-control/subagent-read-stale-worktree-needs-head-pin@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- wan-huiyan/agent-traffic-control
- Path
plugins/agent-traffic-control/skills/subagent-read-stale-worktree-needs-head-pin/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Jul 8, 2026
- Size
- 5,616 bytes
- Repository stars
- 3
- License
- MIT
Read-only subagents (Explore / code-explorer / general-purpose dispatched to AUDIT or READ code, not write) silently return line numbers and "what exists" claims from the WRONG git worktree in a repo with many worktrees — confidently-wrong stale data, no error. Use when: (1) you dispatched 1+ read/audit subagents and their cited file:line numbers, function locations, or "X is/isn't present" claims DON'T match what you read directly in your pinned worktree; (2) `git worktree list` shows 2+…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Read-subagent reads a stale worktree — pin the path AND verify HEAD ## Problem In a repo with many git worktrees (e.g. a `.claude/worktrees/` fan-out of 20+ checkouts, many on stale feature branches), a **read-only subagent** dispatched to audit/read code can resolve the target files inside the *wrong* worktree and return **confidently-wrong** results: line numbers from an old checkout, "function X is at line 1029" when on fresh main it's 1473, or "cov_intel is NOT passed to the template" when it demonstrably IS. There is **no error** — the agent reads real files and reports real (but stale) facts. This is worse than the bash-`cd` worktree trap, which at least commits to a visibly-wrong branch; here the only signal is that the cited lines don't match reality. ## Context / Trigger Conditions - You fanned out 1+ `Explore` / `code-explorer` / general read subagents to audit issues, map a feature, or check "what already exists vs what's missing." - A subagent's cited `file:line`, function location, or presence/absence claim **contradicts your own direct Read-tool read** of the same file in the worktree you're operating in. …
Read the whole file at its exact version.
How to install
mdr add wan-huiyan/agent-traffic-control/subagent-read-stale-worktree-needs-head-pin@sha256:eaeaf0826d03609aThe line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_qveuhtmvauxsmojc)
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Versions
The registry has recorded 1 version of this file, committed on Jul 8, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5616 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
wan-huiyan/agent-traffic-control · 3 stars · license MIT · pushed 2026-09-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_qveuhtmvauxsmojc GET https://markdownregistry.com/api/v1/resolve?ref=wan-huiyan/agent-traffic-control/subagent-read-stale-worktree-needs-head-pin GET https://markdownregistry.com/api/v1/blob/eaeaf0826d03609a1d026569b4b8c30ad28d1285bf7c131d165735cff4fd3965
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.