Three coupled fixes that close a documented bypass of git-gate's
gitleaks pre-receive hook:
1. cred-proxy refuses git smart-HTTP push at runtime. Any path
ending in /git-receive-pack or /info/refs?service=git-receive-pack
returns 403 with a pointer at the bottle.git SSH path. Fetch
(upload-pack) is still allowed — the bypass we're closing is
push, where gitleaks is the load-bearing scanner. Hard guarantee.
2. The provisioner suppresses the cred-proxy `~/.gitconfig` insteadOf
rewrite for any host already declared in bottle.git. git-gate is
the canonical git path there; we don't write a competing rule
that would let `git clone https://<host>/...` succeed in ways
that confuse on push. Defense in depth — (1) is the hard guarantee.
3. cred-proxy routes its outbound HTTPS through pipelock. The
sidecar's environ now sets HTTPS_PROXY=<pipelock-url>, and the
image's entrypoint runs `update-ca-certificates` over the
per-bottle pipelock CA (docker cp'd into
/usr/local/share/ca-certificates/pipelock.crt before start) so
the proxy's HTTPS client trusts pipelock's bumped certs.
Consequence: pipelock's allowlist + body scanner now sit in the
cred-proxy egress path the same way they sit in front of direct
agent traffic. The cred-proxy upstream hosts (api.github.com,
github.com, gitea hosts, registry.npmjs.org) come OFF
pipelock's passthrough_domains. Only api.anthropic.com remains
on passthrough (LLM body content legitimately trips DLP).
PRD 0010 updated to reflect all three. Tests adjusted: the
"cred-proxy hosts go on passthrough" assertion in
test_pipelock_allowlist flips to "they don't", a new
TestIsGitPushRequest exercises the smart-HTTP refusal predicate,
and the gitconfig renderer tests cover the per-host suppression
matrix.
git-gate holds an SSH IdentityFile for push/fetch; cred-proxy holds
a PAT for HTTPS REST API calls. The two brokers are orthogonal —
the common dev setup names both on the same host (e.g. gitea.dideric.is
SSH for push, gitea.dideric.is PAT for `tea pr create`).
The original PRD 0010 wording called this a "configuration smell"
and rejected it at parse time. That was wrong; this drops the
overlap rejection from the validator and updates the PRD prose to
match. Tests flip from "rejection" to "coexistence" assertions.
Make the cred-proxy a per-bottle sidecar container on the bottle's
internal docker network instead of a root-owned process inside the
agent container. The boundary becomes container namespace
separation, matching pipelock and git-gate. Update summary,
problem, goals, in-scope, architecture diagram, components,
existing code touched, external deps, and open questions; add a
"Considered alternatives" section recording the rejected
in-container shape.
Per-bottle reverse proxy that holds API tokens (Anthropic OAuth,
GitHub PAT, Gitea PAT, npm) in a root-owned process; agent gets
only URLs in its environ. AWS / SigV4 explicitly out of scope.
didericis