docs: ResidueForm count 6→8 + Slice 3 closure (#142 + #143)

[hyperpolymath]

Summary

Two corrections to PR #144's narrative refresh.

ResidueForm instance count: 6 → 8

PR #144 stated the post-#139 ResidueForm count as six. The actual count is eight. The pre-#139 baseline was already six (not four): the 2026-05-27 audit-follow-on landed `indexed-residue` + `cost-residue` (lines 181–234 of EchoResidueTaxonomy.agda). PR #139 then added `search-residue` + `epistemic-residue`, for a total of 8.

Slice 3 closure: PRs #142 + #143

PR #144 framed the Slice 3 umbrella case-split as remaining work and the `bpsi=bpsi at equal markers` sub-case as still needing α's rank via rank-adm / rank-lex. Both landed in PRs #142 + #143:

• PR ordinal(buchholz): Slice 3 umbrella extension — _<ᵇ¹_ with joint-bplus + strict-head dispatch #142 — `<ᵇ¹` extension with joint-bplus + strict-head dispatch wires the headline (from ordinal(buchholz): Slice 3 headline — rank-mono-<ᵇ-+1-via-head-Ω under strict-head premise #141) into the umbrella.
• PR ordinal(buchholz): Slice 3 lex-rank companion — bpsi-source-at-equality ψ-rank discharge #143 — `bpsi-source-at-equality` ψ-rank discharge closes the last sub-case via rank-lex.

CHANGELOG + EXPLAINME updated to acknowledge both.

Files

• CHANGELOG.md — count fix + new Slice 3 follow-on bullet (ordinal(buchholz): Slice 3 umbrella extension — _<ᵇ¹_ with joint-bplus + strict-head dispatch #142 + ordinal(buchholz): Slice 3 lex-rank companion — bpsi-source-at-equality ψ-rank discharge #143)
• EXPLAINME.adoc — Slice 3 narrative refreshed
• docs/echo-types/MAP.adoc — 8 instances enumerated with landing dates
• README.md — Tier 2 mermaid label
• readme.adoc — Tier 2 list mirror

Verification

`scripts/kernel-guard.sh` PASS. No Agda code changed.

Test plan

• kernel-guard.sh PASS
• Admin-merge if budget permits

Refs: echo-types#142, echo-types#143, echo-types#144.

🤖 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