docs(S-53): headless Mac credential pattern (System.keychain SA + per-machine SSH key)#79
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…-machine SSH key) Closes the S-51 errata 2026-05-07 "Fix space" question by picking System.keychain for the SA token and pairing it with a per-machine 1P-generated SSH key for outbound git over SSH/mosh. Result: $SECONDARY is self-sufficient for `op` and `git` over any SSH transport without depending on the Security-Session-bound login keychain or on agent forwarding. - New: docs/specs/S-53-headless-mac-credential-pattern.md (status: done, extends S-51) - Update: S-51 status banner points at S-53 as the resolution - Update: 1password-multi-machine.md, secrets-architecture.md, operations/2026-05-mini-sa-seed.md errata callouts updated - Update: tasks.md S-53 entry, S-51 follow-up note - Append: sync-log.md ship entry @ Hans Air M4 Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
$SECONDARY(Mac mini):op whoami,ssh -T git@github.com, andOP_SERVICE_ACCOUNT_TOKENlength all green from the no-agent context (env -u SSH_AUTH_SOCK ssh -a $SECONDARY) that mosh sessions get.Test plan
op whoamireturns SA account info on$SECONDARYwith a per-machine Integration ID distinct from$PRIMARY'sssh -T git@github.comreturns "Hi $USER!" on$SECONDARYwith no forwarded agentssh-add -lconfirms no agent in playOP_SERVICE_ACCOUNT_TOKENlength is non-zero in fresh non-interactive shells🤖 Generated with Claude Code