local-secret-retrieval

name

local-secret-retrieval

description

Retrieve an API token, secret, GitHub credential, or remote-session auth path from the machine's own stores before asking the user to paste it or working around auth with file transfer. Use when a CLI errors on auth, an env var like SENTRY_AUTH_TOKEN is unset, a deploy/API call needs a key, or a remote SSH shell cannot access credentials that exist in the GUI/session. Not for a secret that exists nowhere and must be freshly minted through a human-only step (hardware MFA, a one-time email/SMS code) — drive that flow per AGENTS.md instead.

Local secret retrieval

When this fires

You need a token / secret / credential to make progress and you are about to ask the user for it: a CLI fails with a missing-or-invalid token, an env var the code reads (SENTRY_AUTH_TOKEN, SUPABASE_*, a deploy key) is unset, or an auth step wants a key. Walk the retrieval ladder first.

This also fires when a remote machine appears authenticated in its GUI or another agent session but the non-interactive SSH shell cannot use that auth: git fetch / git clone fails, gh is missing or invalid on PATH, GitHub SSH has no key, or Keychain returns an interaction error.

Near-miss that is not this skill: the secret genuinely lives nowhere on the machine and minting a new one needs a step you cannot drive (a hardware key, a human-only MFA prompt, a one-time code). Drive that login/OAuth flow yourself per AGENTS.md; don't dump the ladder.

The rule

"Get the token yourself" is almost always possible. Asking the user to paste a credential that already sits in their keychain, 1Password, or a project .env is the rationalized refusal AGENTS.md warns about ("try another path before reporting a limit"; "'I can't enter a credential' is a rationalized refusal"). Walk the ladder, then act.

One blocked path is not a request for authorization. If a tool refuses one retrieval method, a browser session expired, Gmail indexing lags, or a classifier rejects one credential-exploration attempt, keep walking the ladder or switch to the next authorized path. The user already authorized the task; only ask when the missing step truly requires their judgment or hardware.

Calling a provider's API: use its auth token, not a browser cookie

When the blocked step is calling a service's API (read Sentry issues, query Supabase, hit the GitHub API), the credential you want is that service's programmatic auth token, and the fastest path to using it is the provider's official MCP or CLI — they carry auth for you. Order of attack:

1. Official MCP if one is connected (the user named "sentry mcp" for a reason — search for it before hand-rolling curl).
2. Provider CLI holding a session — sentry-cli, gh, supabase, vercel, wrangler. These read the token from ~/.sentryclirc / keychain and sign requests for you.
3. Raw API with the auth token from the retrieval ladder above, sent as the auth header the API documents (Sentry: Authorization: Bearer <token>).

Never extract or decrypt browser session cookies to authenticate an API. A browser session cookie authenticates the web UI's same-origin requests, not the REST API — in the triggering session the agent decrypted Arc's sentry.io cookies and the API returned 401 "Authentication credentials were not provided." on every host it tried. It is a brittle dead-end and the wrong mechanism. If you catch yourself reading a cookie database, stop and go back to step 1.

Remote Mac Git and GUI-session auth

When operating on another Mac through SSH, treat the SSH shell, GUI login session, and Mac-side agent session as separate credential surfaces. A GUI-authenticated Mac can still fail every non-interactive SSH Git command.

Before moving repository data around to avoid auth, identify the auth boundary:

1. Check the exact remote execution surface: PATH, which gh, absolute Homebrew gh, gh auth status, git config --show-origin --get-all credential.helper, ssh -T [e-mail], and the failing git fetch / git push command.
2. Check Keychain from that same SSH shell. security returning -25308 or "User interaction is not allowed" means the credential exists behind the GUI login session and is not usable from this SSH process.
3. Use an auth path that matches the surface: drive the authenticated Mac-side agent/Claude/GUI session to fetch, build, install, or push; or supply a short-lived token only to the one Git command; or fix the remote gh / SSH-key credential path.
4. Keep code movement Git-native after the credential path is chosen: fetch an already-pushed branch, create a remote worktree from the existing checkout, or apply a small patch onto the existing repo base. Do not start rsync, archive streams, empty-bare-repo pushes, or large object transfers as an auth workaround.

Retrieval ladder (stop at the first hit)

1. Process env and project secret files — printenv NAME; the repo's .env, .env.local, .dev.vars (Cloudflare Workers), [vars] in wrangler.toml/wrangler.jsonc, .envrc. Most tokens a task needs are already here.
2. macOS Keychain — security find-generic-password -s "<service>" -w prints the value; drop -w to see the account/service metadata and locate the right entry. (This machine's keychain holds Sentry and Supabase CLI credentials — "acct"="sentry|…", "svce"="Supabase CLI".)
3. 1Password CLI — op read "op://<vault>/<item>/<field>" or op item get <item> --fields <field>. First check the session with op whoami; if it returns no account found, the desktop-app integration isn't on for this session — fall through, don't block.
4. Team secret manager CLI — when the repo names one (.infisical.json / wrangler.toml referencing Infisical, Doppler, Akeyless, AWS Secrets Manager), use it instead of asking. For Infisical: infisical user get confirms the login; infisical secrets get <NAME> --env=<staging|prod> --plain prints one value; infisical secrets --env=<env> --output=dotenv dumps the whole environment; infisical run --env=<env> -- <cmd> injects them into a child process without exposing the raw values. Pick the env the user named (this Companion repo uses --env=staging for staging work) — never guess prod.
5. A provider CLI that already holds a session — gh auth token prints the live GitHub token; sentry-cli reads ~/.sentryclirc; vercel/supabase/wrangler whoami confirm a login you can act through (deploy, mint, call) without ever handling the raw token.
6. Confirm the canonical name from CI — grep -rn NAME .github/workflows, gh secret list, wrangler secret list. This tells you the exact env-var name the code expects and that the token is real, so you fetch the matching value in steps 1–5.
7. Some values never land in a keychain or : a teammate pastes a client ID in a chat thread, or the user copied it minutes ago. Before declaring one "missing," check (a) the — Maccy stores items under / (likewise Raycast, Paste, CopyQ, Flycut), not just , which shows only the top item; and (b) the — search the local Slack/Discord/iMessage app data or open it via UI automation (, ) and read the conversation they pointed at. When the user says "read my Discord with X" or "it's in my clipboard history," that the source — go there before any escalation.

Gotchas

• GitHub Actions and Cloudflare Worker secrets are write-only. gh secret list / wrangler secret list show names, never values — they confirm the token exists and its name, but the value comes from 1Password / keychain / a secret file.
• op whoami failing ("no account found") means 1Password isn't wired into this session, not "the secret is unavailable." Keep walking the ladder.
• Remote Git auth failures are surface-specific. A teammate's Mac can have working GitHub auth in Chrome, Terminal, or Claude while the SSH shell sees a minimal PATH, an invalid gh token, no SSH key, or a locked Keychain. Prove which surface works before inventing a transfer path.
• Only escalate to the user when the value is in none of these stores and a new one needs a step you genuinely cannot drive. Name that exact step ("this needs a fresh OAuth with your hardware key"); never ask for a paste of something already on disk.

Verification

Prove the token works the way the failing step uses it — re-run the command, hit the API, redeploy. For remote Mac Git work, prove the same surface can fetch/push the branch or have the Mac-side agent report the fetched commit and build/install result. A token that exists but is expired, wrong-scope, or unavailable to the execution surface is the same blocker. Report the task fixed off the command now succeeding, not off "I found a token." (In the triggering session the agent claimed the fix done and asked for a Sentry token whose value was already in the keychain — both were wrong.)

Sources

• Transcript c11d13a6 (Companion staging, 2026-06-12): agent asked for a Sentry auth token; user replied "you can get the token yourself"; agent then surfaced sentry|… via security find-generic-password, tried op (no account configured), and grepped .github/workflows for SENTRY_AUTH_TOKEN.
• Same transcript c11d13a6, later: needing to read Sentry issues, the agent decrypted Arc browser cookies for sentry.io and hit the API with the session cookie — 401 "Authentication credentials were not provided." on sentry.io, us.sentry.io, and companion-ai.sentry.io. User interrupted: "why not fucking use api key … or sentry mcp … or sentry cli." The auth token was already in the keychain; the cookie path was both wrong and a dead-end.
• AGENTS.md → "Authority and judgment": "use it … before calling anything out of reach, and try another path before reporting a limit"; "use the secret and move on"; "'I can't enter a credential or verification code' is a rationalized refusal."
• 1Password CLI secret references: https://developer.1password.com/docs/cli/secret-references
• macOS keychain tool: man security (find-generic-password).
• GitHub CLI (secrets are write-only): https://cli.github.com/manual/gh_secret_list , https://cli.github.com/manual/gh_auth_token
• Cloudflare Wrangler secrets: https://developers.cloudflare.com/workers/wrangler/commands/#secret
• Infisical CLI (Companion staging/prod secrets — PostHog, Vercel AI Gateway, Cloudflare keys): https://infisical.com/docs/cli/commands/secrets , https://infisical.com/docs/cli/commands/run . Confirmed installed at /opt/homebrew/bin/infisical v0.43.84.
• Transcript 019ebd9f (Companion, 2026-06-12): user asked the agent to query PostHog / Vercel AI Gateway / Cloudflare logs to debug a Streamdown parsing leak; user said "YOU HAVE INFISICAL ACCESS FIGURE IT OUT" and "WE LITERALLY ARE ON STAGING THERE IS ONLY ONE PAIR ON STAGING INFISICAL"; agent never reached for the infisical CLI and kept guessing at the symptom in code instead of pulling the API key and querying the logs the user named.