The load-bearing piece of the multi-account epic (T-476): a bound workspace's
hosted claude now spawns with CLAUDE_CONFIG_DIR set to that account's dir, so
it runs under the bound account end-to-end. Every hosted session (primary /
secondary / fork / teammate) inherits it — the orchestrator already routes all
spawns through agentBootstrap.
- New pure resolver claudeConfigDirForWorkspace(cwd, boundConfigDir, env):
bound account dir > parent CLAUDE_CONFIG_DIR (respect the launcher) > null
(Claude defaults to ~/.claude). The registry is injected as a plain lookup
so agent_bootstrap stays Flutter-free (its tests run under `dart test`).
- agentBootstrap merges CLAUDE_CONFIG_DIR BEFORE base, so an explicit
SpawnSpec.env override still wins (override > binding > parent > unset); the
key is omitted entirely when the resolver returns null.
- Orchestrator carries an optional AccountRegistry; the claude extension builds
it from ctx.settings. Null in tests → no injection (unchanged behaviour).
No way to SET a binding yet (that's the CLI T-480 / settings UI T-482), so no
changelog entry — the mechanism is in place, the surface lands next. Unit tests
cover the resolver's four states and the envDelta precedence.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8
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