docs: post-PR-136 narrative refresh (CHANGELOG + EXPLAINME + MAP + README)

[hyperpolymath]

Summary

Surgical narrative refresh across the five canonical doc surfaces (CHANGELOG.md, EXPLAINME.adoc, docs/echo-types/MAP.adoc, README.md, readme.adoc) to catch up with the six PRs that landed 2026-05-28: #136 (kernel-guard fix), #137 (Slice 3 prerequisites), #138 (EchoImageFactorizationProp), #139 (ResidueTaxonomy Search + Epistemic), #140 (banner kit), #141 (Slice 3 headline).

Changes per file

• CHANGELOG.md (+78 lines) — new `### Added (2026-05-28)` + `### Fixed (2026-05-28)` blocks covering all six PRs with honest framing (Slice 3 headline closure described as "under a strict-head premise"; bpsi=bpsi-at-equal-markers caller-burden sub-case explicitly NOT closed).
• EXPLAINME.adoc (+4 lines) — status-snapshot bullets for Slice 3, canonical identity layer extensions, and CI / foundational hygiene; new `docs/echo-types/echo-kernel-note.adoc` entry in "Where to look first".
• docs/echo-types/MAP.adoc (+14 / -9 net) — new (epi, mono) bullet adjacent to image factorisation; ResidueForm instance count 4 → 6 with Search + Epistemic named; Buchholz proofs list gains RankPowSlice3 + RankPowSlice3Headline with strict-head-premise framing.
• README.md (+2 / -2) — Tier 1 + Tier 2 mermaid node labels updated for ImageFactorizationProp + Search/Epistemic.
• readme.adoc (+2 / -1) — Tier 1 + Tier 2 list mirror updated.

Verification

• `scripts/kernel-guard.sh` PASS (both Check A funext-free + Check B classification-drift).
• No Agda code touched; docs-only refresh.

Honesty constraints preserved

• Slice 3 headline framed as closed under a strict-head premise, not unconditionally.
• bpsi=bpsi-at-equal-markers caller-burden sub-case explicitly named as NOT closed (rank-adm / rank-lex remaining work).
• PR docs(buchholz): obstruction doc — Slice 2-bplus landed, only Slice 3 remains #136 framed as "infrastructure honesty, not a proof-content advance".
• 11/13 per-constructor rank-mono count unchanged.

Test plan

• kernel-guard.sh PASS locally
• CI green on this PR
• Admin-merge once green or budget permits

🤖 Generated with Claude Code

[github-actions]

🔍 Hypatia Security Scan

Findings: 74 issues detected

Severity	Count
🔴 Critical	17
🟠 High	36
🟡 Medium	21

⚠️ Action Required: Critical security issues found!

View findings

[
  {
    "reason": "No test directory or test files found",
    "type": "no_tests",
    "file": "/home/runner/work/echo-types/echo-types",
    "action": "flag",
    "rule_module": "honest_completion",
    "severity": "high",
    "deduction": 20
  },
  {
    "reason": "Issue in codeql.yml",
    "type": "missing_workflow",
    "file": "codeql.yml",
    "action": "create",
    "rule_module": "workflow_audit",
    "severity": "high"
  },
  {
    "reason": "Issue in secret-scanner.yml",
    "type": "missing_workflow",
    "file": "secret-scanner.yml",
    "action": "create",
    "rule_module": "workflow_audit",
    "severity": "high"
  },
  {
    "reason": "Issue in agda.yml",
    "type": "unknown",
    "file": "agda.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in agda.yml",
    "type": "unknown",
    "file": "agda.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in governance.yml",
    "type": "unknown",
    "file": "governance.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in hypatia-scan.yml",
    "type": "unknown",
    "file": "hypatia-scan.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in mirror.yml",
    "type": "unknown",
    "file": "mirror.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Issue in scorecard.yml",
    "type": "unknown",
    "file": "scorecard.yml",
    "action": "flag",
    "rule_module": "workflow_audit",
    "severity": "medium"
  },
  {
    "reason": "Agda postulate assumes without proof -- potential soundness hole (1 occurrences, CWE-704)",
    "type": "agda_postulate",
    "file": "/home/runner/work/echo-types/echo-types/tutorial/epistemic_erasure/EpistemicErasure.agda",
    "action": "flag",
    "rule_module": "code_safety",
    "severity": "critical"
  }
]

Powered by Hypatia Neurosymbolic CI/CD Intelligence