Extends bin/gstack-config to support the brain-aware planning layer:
KEY VALIDATION (T5):
Plain alphanumeric/underscore now extended to allow @<hex-hash> suffix.
Required for per-endpoint namespaced keys (brain_trust_policy@<sha8>,
user_slug_at_<sha8>). Keys without the suffix still validate as before.
VALUE WHITELISTING (D4 / D11):
brain_trust_policy@* values gated to personal | shared | unset.
Unknown values warn + default to unset (defense against typos).
NEW DEFAULTS (lookup_default):
brain_trust_policy@* -> unset
salience_allowlist -> '' (resolver uses SALIENCE_DEFAULT_ALLOWLIST)
user_slug_at_* -> '' (resolve-user-slug fills + persists on demand)
NEW SUBCOMMANDS:
endpoint-hash — print sha8 of active gbrain MCP URL from
~/.claude.json. Collision check escalates to sha16
when a prior endpoint stored at the same sha8
would conflict (T10 defensive default).
resolve-user-slug — walks D4 A3 identity chain:
1. mcp__gbrain__whoami.client_name
2. $USER env var
3. sha8(git config user.email)
4. anonymous-<sha8(hostname)>
Persists result on first call so subsequent
calls are stable across sessions.
test/user-slug-fallback.test.ts: 14 tests covering endpoint-hash output
shape, fallback chain ordering, persistence, brain_trust_policy
namespace value validation + per-endpoint isolation, and key validator
extension for @-suffixed keys.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Garry Tan