docs(CLAUDE.md): workspace-test is a 3-shard matrix with a fan-in check; mini-m4 has a lane (PACK-001, #3488)

[noahgift]

Documents the CI topology PR #3488 lands: workspace-test as a 3-shard nextest matrix with the fan-in check-run of the same name, the explicit-fragment sharding, the shard-3 examples build, per-shard cargo state, the measured numbers and the saturation caveat, and the mini-m4 mac-check lane. Every path cited exists on main; readme_contract (FALSIFY-DOCS-CLAUDE-001) is the gate.

Queues behind #3488 (armed later, so the queue orders it after).

keep-open: #3477 — documentation of the train's CI change; the epic stays open.
ont-delta: none — CLAUDE.md prose only.

🤖 Generated with Claude Code

[noahgift]

quorum-review (AD-04): NOT agreed (auto_merge: checked=true was_armed=false disarmed=false)

{
 "ticket": "PMAT-3477",
 "head": "eefc52cad69569bf091f56ac2ae3eab238bb8201",
 "width": 3,
 "executor": "agy",
 "agreed": false,
 "auto_merge": {
  "checked": true,
  "was_armed": false,
  "disarmed": false,
  "note": "auto-merge not armed"
 },
 "lanes": [
  {
   "lane": 1,
   "verdict": "FAIL",
   "findings": 1
  },
  {
   "lane": 2,
   "verdict": "PASS",
   "findings": 1
  },
  {
   "lane": 3,
   "verdict": "PASS",
   "findings": 1
  }
 ]
}

[github-actions]

§13.11 rung 1 — quorum shadow verdict

S13-SHADOW pr=3494 head=9a4fcb9a553f5e0269111a7c212803b7e7f6557e verdict=REFUSE class=Q1 arm_rc=1

Shadow mode: this records a verdict and merges nothing. A refusal
to arm is not a block (§13 adds zero rows to §7) — the pull request is
exactly as green as it was.

[noahgift]

quorum-review (AD-04): three PASS — agreed (auto_merge: checked=true was_armed=false disarmed=false)

{
 "ticket": "PMAT-3477",
 "head": "eefc52cad69569bf091f56ac2ae3eab238bb8201",
 "width": 3,
 "executor": "agy",
 "agreed": true,
 "auto_merge": {
  "checked": true,
  "was_armed": false,
  "disarmed": false,
  "note": "auto-merge not armed"
 },
 "lanes": [
  {
   "lane": 1,
   "verdict": "PASS",
   "findings": 3
  },
  {
   "lane": 2,
   "verdict": "PASS",
   "findings": 0
  },
  {
   "lane": 3,
   "verdict": "PASS",
   "findings": 1
  }
 ]
}

[noahgift]

slipped_from: 0.68.2 — PACK-001 docs ride 0.69.0 with #3488; carried so the 0.68.2 cut gate is green.

[noahgift]

slipped_from: 0.69.0. §4.1 freeze for the 0.69 cut today (operator 2026-09-21: "ensure this happens"). Not on the 0.69 platform (#3669 + bump). Rides 0.70. — aprender-04 (cop)

[noahgift]

fold source for the 0.70 integration branch; branch kept at docs/pack-001-ci-shards-claude-md @ 9a4fcb9a553f5e0269111a7c212803b7e7f6557e.

Closed under the operator 1-day PR rule (2026-09-24); the rule does not wait on #4046. aprender-6c folds from the branch ref above into the 0.70 integration branch (built off main after #4046 merges).