Code scanning alert 71 (actions/untrusted-checkout/high) has stayed open
against main at the `Checkout PR branch` step — the same step #1966 added
the `is_fork == 'false'` guard to. The rule is syntactic, so it cannot see
that guard, the job-level author_association check, or the repo's
`collaborators_only` fork-PR policy; no hardening around the step clears it
while the step exists.
The step turns out to be redundant anyway. claude-code-action fetches and
checks out the PR branch itself, and its own docs name a bare base-ref
checkout as the preferred pattern — which is what upstream's own claude.yml
does. Our lookup-then-checkout pair is vestigial from the v1 example
workflow inherited in #1869.
So: delete the PR-head checkout, make the base checkout unconditional, and
drop the now-unused `sha` output. The `is_fork` gate on Run Claude Code
stays, and is now the only thing keeping fork code out of the workspace —
the action fetches a cross-repository head via refs/pull/N/head on its own.
Closes#2069
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JTHVxSu8AUgHRLvo1ntZ8H
Signed-off-by: cliffhall <cliff@futurescale.com>
Two pieces of hardening on the Claude Code workflow, plus a comment for a
finding that needed no change.
Same-repo gating. `Get PR details` now emits an `is_fork` output, and the
PR-head checkout and the `Run Claude Code` step are both gated on it. A fork
PR is declined outright — no checkout, no agent run, with the reason written
to the step summary — rather than falling through to a "metadata-only" review
of the base tree, which would trade an untrusted-code problem for a
wrong-tree one. A deleted fork (`head.repo` null) counts as a fork.
The head checkout also drops its `repository:` input: only a same-repo head
reaches that step now, and checkout's default `github.repository` is a value
no PR can influence.
SHA pins. actions/checkout, actions/github-script, and claude-code-action
were all on mutable major tags in a job that holds ANTHROPIC_API_KEY and
grants the agent Bash. Each is now pinned to a full commit SHA with the
trailing `# vX.Y.Z` comment Dependabot reads, so upgrade automation is
unaffected. Pinned to the v7 / v9 SHAs so this does not regress the bumps in
the open Dependabot PR #1922.
The failure fallback Copilot flagged turns out not to exist: `Checkout
repository` carries no status-check function, so GitHub applies an implicit
`success()` and skips it after a failed lookup regardless of the `outcome`
comparison. Its condition is now the explicit `== 'skipped'` and says so.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SW1p8E2uiyyLx4RKwrwSrt
* ci: restore the Claude Code workflow, lost in the v2 tree swap
Closes#1850.
Restored byte-for-byte from ac3c1a12 (sha256
1c44f2d9d51c936adb40c9acefd4b44628fe7810360e2f8196034347f9d2602d,
3592 bytes). No content changes.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YAt8rqxysNbhYWLhoRm3fU
* ci: restore .mcp.json, which claude.yml's --mcp-config points at
The restored workflow runs with `--mcp-config .mcp.json` and
`--allowedTools "Bash,mcp__mcp-docs"`, so without this file the mcp-docs
server never registers and those tools do not resolve.
Lost in the same tree swap: .mcp.json survives only on v1/main, and is
absent from both main and v2/main. Restored byte-for-byte from 47f92841
(sha256 b0f0b8ea0d6c6e4bd9d19270db8c4ed13a951c6a7d8fa9a7b76d0d12ddd2491f,
123 bytes). No content changes.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YAt8rqxysNbhYWLhoRm3fU
---------
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
