docs(ahbg): extract calibration evidence receipts from closed #18/#19

Carry the comparison results, corpus receipts, and reproducible calibration
evidence needed by canonical AHBG. Provider workspace trees under
stack/ahbg/codex and stack/ahbg/deepseek are not merged; closed branches are
treated as experiment receipts only.

Records frozen build SHAs (Grok cce9cec, Codex ffb64c2, DeepCode ec07f46),
the 35/35 successor runs, all six directional SURVIVED checks, the successor
corpus receipt (1.0.1-proposal-1, scenario digest 371d2361), the canonical
main corpus path/digest (bc521113ffa7), and preserved evidence caveats.

Author: erinepshovel-code

ahbg/calibration-evidence/CALIBRATION_EVIDENCE.json

@@ -0,0 +1,131 @@
+{
+  "schema": "interdependency.ahbg.calibration-evidence/1.0.0",
+  "standing": "experiment-receipts-not-production-workspaces",
+  "extracted_from": {
+    "closed_prs": [18, 19],
+    "branch_heads_at_extraction": {
+      "agent/ahbg-codex": "af67642f987124f91aad63e4583422602ed508eb",
+      "agent/ahbg-deepcode": "34648ed63e8e41c8dc775ecc59a253257c5a9de8",
+      "agent/ahbg-grok": "03e77a33f2a79bc586c25b17e04147a29a187218"
+    },
+    "policy": "provider workspace trees under stack/ahbg/codex and stack/ahbg/deepseek are not merged into main; only comparison results, corpus receipts, and reproducible calibration evidence are carried here."
+  },
+  "builders": [
+    {
+      "builder": "Grok",
+      "branch": "agent/ahbg-grok",
+      "frozen_build_sha": "cce9cec7dae61304118efcd47bc0d7461200d335",
+      "successor_corpus_run": {
+        "scenarios": 35,
+        "survived": 35,
+        "falsified": 0,
+        "unresolved": 0,
+        "blocked": 0
+      }
+    },
+    {
+      "builder": "Codex",
+      "branch": "agent/ahbg-codex",
+      "frozen_build_sha": "ffb64c274583d8539f8f4fe7e0aa77366689e910",
+      "freeze_verification": {
+        "a0_tests": "7 OK",
+        "ahbg_tests": "12 OK",
+        "python_compile": "15 files OK",
+        "artifact_check": "SURVIVED",
+        "calibration_smoke_summary": {
+          "survived": 4,
+          "falsified": 0,
+          "unresolved": 2,
+          "blocked": 0
+        }
+      },
+      "successor_corpus_run": {
+        "scenarios": 35,
+        "survived": 35,
+        "falsified": 0,
+        "unresolved": 0,
+        "blocked": 0
+      },
+      "evidence_caveat": "Codex recorded that its conversation inspected sibling DeepCode/DeepSeek files before the workspace correction; the frozen implementation lives under stack/ahbg/codex and does not import sibling code."
+    },
+    {
+      "builder": "DeepCode",
+      "branch": "agent/ahbg-deepcode",
+      "frozen_build_sha": "ec07f465184e7a37af856bc5b301bd8eaa4f097b",
+      "coordination_base_commit": "8fd2923292361b1956a003bd5c74eae50a5323b0",
+      "successor_corpus_run": {
+        "scenarios": 35,
+        "survived": 35,
+        "falsified": 0,
+        "unresolved": 0,
+        "blocked": 0
+      }
+    }
+  ],
+  "corpus_receipt": {
+    "corpus_id": "calibration-family",
+    "proposal_version": "1.0.1-proposal-1",
+    "scenario_count": 35,
+    "canonical_scenarios_sha256": "371d2361f57b56d73544f58b247704617d550a7a0685a133c4f8b1ff3b36c835",
+    "corpus_json_sha256_at_successor_runs": "ea172cb68a1a31be843f45c9886590f95f60daad4f10b9e42732bfd416ef73ab",
+    "canonical_main_corpus_file_sha256": "bc521113ffa7bd6d5094c71f3ad66547d5f00260f380258e43c2086533a5d7ed",
+    "canonical_main_corpus_path": "ahbg/deepseek/corpus-proposal/corpus.json",
+    "note": "canonical main re-serialized the corpus file after the successor runs; the scenario digest is unchanged. Both file digests are recorded so the successor-run receipt remains reproducible.",
+    "predecessor": {
+      "proposal_version": "1.0.0-proposal-1",
+      "canonical_scenarios_sha256": "b05cba2cf2f15583548cc15158f09e2612545c978b6a42ddeb314f1e4ed0e5e0",
+      "merged_to_main_as": "3a92c7b0f8568e6fc2600b45bca760030ea2ba3f",
+      "merged_via_pr": 5
+    }
+  },
+  "directional_checks": [
+    {
+      "checker": "Grok",
+      "subject": "Codex",
+      "subject_frozen_build": "ffb64c274583d8539f8f4fe7e0aa77366689e910",
+      "standing": "SURVIVED",
+      "checker_artifact": "ahbg/grok/reviews/codex-review.json"
+    },
+    {
+      "checker": "Grok",
+      "subject": "DeepCode",
+      "subject_frozen_build": "ec07f465184e7a37af856bc5b301bd8eaa4f097b",
+      "standing": "SURVIVED",
+      "checker_artifact": "ahbg/grok/reviews/deepcode-review.json"
+    },
+    {
+      "checker": "Codex",
+      "subject": "Grok",
+      "subject_frozen_build": "cce9cec7dae61304118efcd47bc0d7461200d335",
+      "standing": "SURVIVED",
+      "checker_artifact": "ahbg/codex/reviews/grok-review.json"
+    },
+    {
+      "checker": "Codex",
+      "subject": "DeepCode",
+      "subject_frozen_build": "ec07f465184e7a37af856bc5b301bd8eaa4f097b",
+      "standing": "SURVIVED",
+      "checker_artifact": "ahbg/codex/reviews/deepcode-review.json"
+    },
+    {
+      "checker": "DeepCode",
+      "subject": "Grok",
+      "subject_frozen_build": "cce9cec7dae61304118efcd47bc0d7461200d335",
+      "standing": "SURVIVED",
+      "checker_artifact": "ahbg/deepseek/reviews/grok-review.json"
+    },
+    {
+      "checker": "DeepCode",
+      "subject": "Codex",
+      "subject_frozen_build": "ffb64c274583d8539f8f4fe7e0aa77366689e910",
+      "standing": "SURVIVED",
+      "checker_artifact": "ahbg/deepseek/reviews/codex-review.json"
+    }
+  ],
+  "hmmm": [
+    "world-digest mismatches remain 35 of 35 in the burden-coupling comparison (expected while standing is binding);",
+    "formal sealing of the successor corpus is recorded as adopted on main, not as a three-way branch merge;",
+    "Codex evidence caveat about inspecting sibling files before workspace correction is preserved and not erased;",
+    "provider workspace trees on the closed branches are receipts only and are intentionally not merged."
+  ]
+}

ahbg/calibration-evidence/CALIBRATION_EVIDENCE.md

@@ -0,0 +1,74 @@
+# AHBG calibration evidence
+
+Extracted from the closed calibration PRs #18 (Codex) and #19 (DeepCode) on
+2026-09-01. The provider workspace trees (`stack/ahbg/codex`,
+`stack/ahbg/deepseek`) remain branch-resident experiment receipts; only the
+comparison results, corpus receipts, and reproducible calibration evidence are
+carried here.
+
+Machine-readable record: [`CALIBRATION_EVIDENCE.json`](CALIBRATION_EVIDENCE.json).
+
+## Frozen builds
+
+| Builder | Branch | Frozen build SHA |
+|---|---|---|
+| Grok | `agent/ahbg-grok` | `cce9cec7dae61304118efcd47bc0d7461200d335` |
+| Codex | `agent/ahbg-codex` | `ffb64c274583d8539f8f4fe7e0aa77366689e910` |
+| DeepCode | `agent/ahbg-deepcode` | `ec07f465184e7a37af856bc5b301bd8eaa4f097b` |
+
+Branch heads at extraction: Codex `af67642`, DeepCode `34648ed`, Grok `03e77a3`.
+
+## Successor corpus receipt
+
+- Corpus `calibration-family`, proposal `1.0.1-proposal-1`, 35 scenarios.
+- Canonical scenarios digest:
+  `371d2361f57b56d73544f58b247704617d550a7a0685a133c4f8b1ff3b36c835`.
+- Corpus JSON file digest at the successor runs:
+  `ea172cb68a1a31be843f45c9886590f95f60daad4f10b9e42732bfd416ef73ab`.
+- Canonical main re-serialized the corpus file; current
+  `ahbg/deepseek/corpus-proposal/corpus.json` file digest is
+  `bc521113ffa7bd6d5094c71f3ad66547d5f00260f380258e43c2086533a5d7ed`
+  with the same scenario digest.
+- Predecessor `1.0.0-proposal-1`, digest
+  `b05cba2cf2f15583548cc15158f09e2612545c978b6a42ddeb314f1e4ed0e5e0`,
+  merged to main as `3a92c7b0` via PR #5.
+
+## Successor runs
+
+All three builders: **35 SURVIVED / 0 FALSIFIED / 0 UNRESOLVED / 0 BLOCKED**.
+
+Codex freeze verification: `a0` tests 7 OK, `ahbg` tests 12 OK, Python
+compile 15 files OK, artifact check SURVIVED, calibration smoke summary
+4 survived / 0 falsified / 2 unresolved / 0 blocked.
+
+## Six directional checks — all SURVIVED
+
+| Checker | Subject | Subject frozen build | Checker artifact |
+|---|---|---|---|
+| Grok | Codex | `ffb64c2` | `ahbg/grok/reviews/codex-review.json` |
+| Grok | DeepCode | `ec07f46` | `ahbg/grok/reviews/deepcode-review.json` |
+| Codex | Grok | `cce9cec` | `ahbg/codex/reviews/grok-review.json` |
+| Codex | DeepCode | `ec07f46` | `ahbg/codex/reviews/deepcode-review.json` |
+| DeepCode | Grok | `cce9cec` | `ahbg/deepseek/reviews/grok-review.json` |
+| DeepCode | Codex | `ffb64c2` | `ahbg/deepseek/reviews/codex-review.json` |
+
+No builder was falsified. Agreement across independent builds is replication
+evidence, not proof.
+
+## Evidence caveats (preserved, not erased)
+
+- Codex recorded that its conversation inspected sibling DeepCode/DeepSeek
+  files before the workspace correction; the frozen implementation lives under
+  `stack/ahbg/codex` and does not import sibling code.
+- DeepCode's frozen build was reviewed by Grok and Codex; later commits on the
+  branch are metadata, extension evidence, and reciprocal-review records that
+  do not alter the frozen implementation.
+
+## hmmm
+
+- World-digest mismatches remain 35 of 35 in the burden-coupling comparison
+  (expected while standing is binding).
+- Formal successor sealing is recorded as adopted on main, not as a three-way
+  branch merge.
+- Provider workspace trees on the closed branches are receipts only and are
+  intentionally not merged into main.