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12a3d67731
Fixes five deeper active-only registration bugs surfaced by Copilot review
after 2486c08, all in the presets/extensions single-active integration
rule (#2948):
1. presets: _reconcile_composed_commands (run after install/remove)
bypassed the active-only filter entirely, writing composition-winner
command files for every detected non-skill agent via
register_commands_for_non_skill_agents. Added an only_agent param to
that registrar method (mirroring register_commands_for_all_agents)
and threaded it through all 5 reconciliation call sites.
2. presets: `integration use copilot` with --skills (ai_skills: true)
wrote both the static .agent.md command file AND the SKILL.md
mirror for the same override. Mirrored the extension path's
ai_skills guard in both _register_commands and the reconciliation
pass: a command-backed active agent running in skills mode is
excluded from non-skill command registration.
3. presets: registered_skills was a flat list, so switching between
two skill-mode agents (e.g. Claude -> Codex) and then removing the
preset only restored the currently active agent's directory,
permanently orphaning the other. _unregister_skills now restores
every existing skill-mode agent directory instead of only the
active one.
4. extensions: load_init_options() collapses "no file" and "corrupted
file" into the same {}, so the round-2 fail-closed fix didn't
actually distinguish them. Added a shared
resolve_active_agent_for_registration() helper in _init_options.py
that checks file existence separately from parse success, returning
a distinct sentinel for "file absent" vs None for "corrupted or
invalid". extensions/__init__.py now uses this helper.
5. presets: same corruption-collapsing bug in _register_commands's
active_agent resolution. Now uses the same shared helper as (4).
Adds regression tests for all five: reconciliation active-only
filtering, copilot --skills dual-write prevention, multi-skill-agent
switch+remove, and corrupted init-options fail-closed behavior for
both extension add and preset add. Each test was verified to fail
against the pre-fix code and pass with the fix.
Targeted (883) and full (3923 passed, 109 skipped) suites pass; ruff
check clean.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>