Conciseness

The body is efficient and assumes competence (no explanation of what codex or tmux is; commands given directly), but there is trimmable material: the `bun run install:codex-dev` dev-build detection paragraph is tangential to the QA flow, the web-terminal visual QA section is detailed enough to belong in a reference file, and the 'real `~/.codex` unchanged' guarantee is repeated across the golden rules, scripts index, and elsewhere. These are minor instances of over-explanation, matching the score-4 anchor rather than the lean score-5 anchor.

Actionability

Guidance is copy-paste ready throughout: `bash scripts/lib/common.sh --self-check`, a router table giving the exact script and flag per case (`scripts/app-server-drive.sh --plugin`, `scripts/hook-unit-probe.sh --self-test`, etc.), and an evidence-capture block with real commands (`ev=".omo/evidence/$(date +%Y%m%d)-codex-qa-<slug>"; mkdir -p "$ev"` plus two full script invocations). The router covers the common cases and the manual fallback rule (`export CODEX_HOME="$(mktemp -d)/codex"`) is executable as written.

Workflow Clarity

The flow is clearly sequenced — setup self-check, router by need, matching QA to change scope, then evidence capture — with explicit validation checkpoints: each script's `--self-test` 'asserts its scenario against the live machine', every script 'shasums `~/.codex/config.toml` before and after and asserts it unchanged', and the hard rule 'no evidence file == the QA did not happen'. These are genuine feedback loops (assert → capture evidence → fail loudly), matching the top anchor.

Progressive Disclosure

The SKILL.md body is a well-signaled overview with a router table linking each case to one-level-deep references, and all six linked files (isolation.md, app-server.md, docker-qa.md, install-verify.md, components-hooks.md, logging-debug.md) actually exist in the bundle alongside the referenced scripts. Content is appropriately split: decisions and commands inline, deep dives in references — matching the clear-overview anchor. The only blemish is that a few repo-level paths (script/agent/qa-docker.sh, docs/reference/web-terminal-visual-qa.md) point outside the skill bundle, but the in-bundle structure itself is exemplary.

Specificity

The description lists multiple concrete actions — 'drives the real `codex app-server` against an isolated CODEX_HOME plus a LOCAL mock model', 'asserting hook/started + hook/completed notifications', 'isolated install verification, per-component hook probes, a tmux TUI smoke, and runtime log observation' — giving comprehensive coverage of the skill's QA capabilities with no vague filler.

Completeness

Both 'what' and 'when' are explicitly answered: the what is the detailed method paragraph (app-server + mock model + notification assertions plus supporting scripts), and the when is 'Use whenever someone changes anything under packages/omo-codex or wants to QA, smoke-test, verify, or debug the Codex plugin, its hooks/components, the installer/config.toml, the app-server flow, or the Codex TUI' with concrete trigger phrases appended.

Trigger Term Quality

The explicit trigger list covers natural synonyms and phrasings users would say: 'codex qa, qa codex, codex-qa, test codex plugin, verify codex hook, codex app-server, lazycodex qa, isolated CODEX_HOME, prove codex hook fired, codex tui test'. This is comprehensive coverage including repo-specific and command-shaped variants.

Distinctiveness Conflict Risk

The skill occupies a clear niche — QA of a specific plugin (lazycodex / packages/omo-codex) in strict isolation — and its triggers are scoped to that niche ('lazycodex qa', 'verify codex hook', 'codex-qa'), so it is unlikely to fire for unrelated skills. Minor residual overlap only with hypothetical other Codex skills, which keeps it at the top anchor rather than below.