Files
multica/server/internal/daemon/execenv
Bohan Jiang 384ddcbe65 fix(execenv): seed user-installed Codex skills into per-task CODEX_HOME MUL-1626 (#2519)
* fix(execenv): seed user-installed Codex skills into per-task CODEX_HOME

Codex is the only daemon runtime whose HOME is redirected — the daemon
sets CODEX_HOME to a per-task isolated directory so each task gets a
clean config slate without polluting ~/.codex/. Side effect: the codex
CLI never sees the user's `~/.codex/skills/` and tells the user no skill
was found.

Other runtimes (claude / copilot / opencode / pi / cursor / kimi / kiro)
don't have this issue: they leave HOME untouched and discover both
user-level skills (from ~/.<runtime>/skills) and workspace-assigned
skills (written to a workdir-local dotfile dir) natively. Codex is the
outlier.

Fix: in execenv.Prepare and execenv.Reuse, copy each subdirectory under
`~/.codex/skills/` into the per-task `codex-home/skills/` before writing
workspace-assigned skills. Workspace skills still win on sanitized-name
conflict; user-level installer symlinks (lark-cli style) are followed so
the per-task home gets real content rather than dangling links.

Closes #1922

Co-authored-by: multica-agent <github@multica.ai>

* fix(execenv): wipe per-task codex skills dir before each hydration

Without this, the Reuse path leaves two classes of stale state behind:

1. Round 1 seeded user skill `writing/drafts/stale.md`. Round 2 reuses
   the same workdir with workspace skill `Writing` assigned: seed
   stage skips user `writing` (reserved), workspace stage writes
   `SKILL.md` via MkdirAll + WriteFile but never clears the directory,
   so the round-1 user support files surface under the workspace
   skill — violating "workspace fully wins on name conflict" and
   potentially leaking user-level files into a workspace skill view.

2. User uninstalls a skill from ~/.codex/skills between two runs. The
   prior copy in codex-home/skills/<name>/ lingers, so the codex CLI
   keeps seeing the removed skill.

Fix: RemoveAll(codex-home/skills) at the start of hydrateCodexSkills,
then re-seed user skills and re-write workspace skills. On Prepare
this is a no-op (envRoot was already wiped); on Reuse it resets the
slate.

Added two regression tests covering both scenarios.

Co-authored-by: multica-agent <github@multica.ai>

---------

Co-authored-by: multica-agent <github@multica.ai>
2026-05-13 16:35:03 +08:00
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