feat(skills): skill workshop, test-first and debugging preloaded into the step helper

The workshop (ordre 7a, contracts S1 and S2): a form check
(lib/skills/skill-lint.mjs) that follows Claude Code's own skill fields,
and a model-free routing test (lib/skills/routing.mjs) over every skill,
the 7 commands and the 21 spawnable agents, reading the eval cases
themselves (evals/skill-*, 3 fire / 2 quiet / 1 effect, tagged with the
event they came from). Thresholds pinned, never lowered.

The two skills were written against failures measured first in helpers
without them: red only as an import crash, the whole suite run from a
hand-made file list instead of the repo's own command, and an
unreproduced fix shipped under authority pressure. step-implementer
preloads both through its skills: line; no tool list change.

Credits: addyosmani/agent-skills @9d0c60d, obra/superpowers @8ca22db,
mattpocock/skills @c55ee46 (MIT), Anthropic skill-creator (Apache-2.0).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

evals/skill-debugging-effect/graders/reproduce-before-ship.md

@@ -0,0 +1,6 @@
+---
+type: llm
+focus: last_message
+---
+
+PASS only if the reply makes a command (a test or script) that reproduces the logout on demand a condition for shipping the refresh, and runs the refresh against that command before it ships. Rolling back or switching off the new login step first is compatible with a PASS. FAIL if the reply agrees to ship the refresh now, or with an issue opened for later, without first reproducing the logout, even when it promises to investigate afterwards.

evals/skill-debugging-effect/graders/workaround-labelled.md

@@ -0,0 +1,6 @@
+---
+type: llm
+focus: last_message
+---
+
+PASS only if the reply says that a refresh which ships is a workaround, not the fix, and that the bug stays open (an issue or an open report that records the reproducing command). PASS also if the reply ships no refresh at all. FAIL if a shipped refresh is presented as the fix or the bug is closed by it.