feat: bind synthetic evidence payloads to released receipts

CHANGELOG.md

@@ -1,5 +1,19 @@
 # Changelog
 
+## v0.2.0 - 2026-09-05
+
+Substantive synthetic evidence-contract release. The profile remains v0.1.0
+and characterization-only.
+
+- Adds retrievable, digest-verified synthetic evidence payloads for every
+  released observation and a canonical synthetic target-configuration manifest.
+- Adds a local-only receipt index with artifact path, media type, size, SHA-256,
+  producer, redaction status, and contract claim ceiling.
+- Adds a dependency-free verifier plus positive/negative control: clean fixtures
+  pass, while seeded payload corruption fails.
+- Does not add provider observations, independent validation, certification, or
+  production-enforcement claims.
+
 ## v0.1.5 - 2026-08-07
 
 Distribution-only release. The profile schema, evidence schema, and synthetic

README.md

@@ -16,11 +16,11 @@ configs:
 
 # MCP Sandbox Authority Boundary Profile
 
-**Profile v0.1.0 · Release v0.1.5 - Experimental Characterization Profile**
+**Profile v0.1.0 · Release v0.2.0 - Experimental Characterization Profile**
 
 **Profile release date:** 2026-07-23
 
-**Latest distribution release date:** 2026-08-07
+**Latest distribution release date:** 2026-09-05
 
 > **Execution containment is not proof of bounded authority.**
 
@@ -38,13 +38,13 @@ run. The versioned JSON files and dependency-free validator remain authoritative
 
 ## Evidence Passport and fixture bundle
 
-The [Evidence Passport](artifacts/evidence-passport-v0.1.5.json) is a compact,
+The [Evidence Passport](artifacts/evidence-passport-v0.2.0.json) is a compact,
 machine-readable receipt for the release: canonical artifact hashes, validator
 commands, reproduction command, and its explicit claim ceiling. It lets a
 reviewer verify the distributed inputs without inferring anything about an
 external target.
 
-The [synthetic fixture bundle](artifacts/authority-boundary-synthetic-fixture-bundle-v0.1.5.zip)
+The [synthetic fixture bundle](artifacts/authority-boundary-synthetic-fixture-bundle-v0.2.0.zip)
 contains the profile, schema, complete synthetic characterization, viewer index,
 coverage matrix, validators, and a hash manifest. It is intentionally
 synthetic-only and contains no credentials, provider observations, or target
@@ -56,6 +56,8 @@ To rebuild both artifacts from a pinned checkout:
 python3 scripts/build_distribution_artifacts.py
 python3 scripts/validate_profile.py
 python3 scripts/validate_viewer_split.py
+python3 scripts/verify_evidence_bindings.py
+python3 scripts/test_evidence_bindings.py
 ```
 
 For an independent replay, use [REPRODUCE.md](REPRODUCE.md) and the structured
@@ -153,8 +155,10 @@ locally and bound to the evidence record by digest before validation.
   record template
 - `scripts/verify_replay_record.py` - validates a completed replay record's
   structure without validating its assertions
-- `artifacts/evidence-passport-v0.1.5.json` - machine-readable release receipt
-- `artifacts/authority-boundary-synthetic-fixture-bundle-v0.1.5.zip` -
+- `evidence/evidence-index-v0.2.0.json` - local synthetic evidence receipts
+  and target-configuration binding
+- `artifacts/evidence-passport-v0.2.0.json` - machine-readable release receipt
+- `artifacts/authority-boundary-synthetic-fixture-bundle-v0.2.0.zip` -
   reproducible synthetic fixture bundle
 
 ## Limitations
@@ -167,9 +171,9 @@ must be recorded explicitly.
 ## Release metadata and compatibility
 
 - **Profile schema:** v0.1.0, Experimental Characterization Profile, 2026-07-23
-- **Current distribution release:** `v0.1.5`, 2026-08-07. It adds an
-  independent replay packet with a non-endorsement record contract. The v0.1.0
-  profile schema and synthetic run are unchanged.
+- **Current distribution release:** `v0.2.0`, 2026-09-05. It adds retrievable,
+  digest-verified synthetic evidence and a synthetic target-configuration
+  manifest without adding any live target or provider claim.
 - **Corrective release:** `v0.1.1`, 2026-08-01, corrects a stale
   coverage-matrix case identifier and adds a validator that prevents future
   matrix/profile drift.
@@ -196,14 +200,19 @@ must be recorded explicitly.
 }
 ```
 
-## Planned evidence-binding extension
+## Evidence-binding extension
 
-The v0.1 profile records an evidence digest and producer but does not yet
-package retrievable evidence payloads or target-configuration manifests. A
-future substantive profile revision will define explicit algorithm, artifact
-URI, media type, size, and retrievable synthetic evidence/configuration
-artifacts. That work changes the evidence contract and is intentionally not
-represented as part of this v0.1.1 corrective release.
+Release v0.2.0 adds a retrievable, local-only synthetic evidence contract:
+[`evidence/evidence-index-v0.2.0.json`](evidence/evidence-index-v0.2.0.json)
+binds every synthetic observation to a payload path, media type, byte size,
+SHA-256 digest, producer, redaction status, and the synthetic target-
+configuration manifest. `scripts/verify_evidence_bindings.py` rejects missing,
+external, malformed, or digest-mismatched bindings; its control test proves a
+clean fixture passes and seeded payload corruption fails.
+
+This is **I0 synthetic evidence-contract work**. It improves reproducibility
+and artifact integrity. It is not independent validation, provider
+characterization, certification, or proof of production enforcement.
 
 ## Synergy with existing work
 

artifacts/evidence-passport-v0.2.0.json

@@ -0,0 +1,168 @@
+{
+  "artifact": "MCP Sandbox Authority Boundary Profile Evidence Passport",
+  "release": "v0.2.0",
+  "profile_schema_version": "0.1.0",
+  "output_type": "characterization",
+  "classification": "synthetic-only distribution artifact",
+  "claim_ceiling": "This release documents a synthetic characterization profile only. It is not a certification, conformance determination, provider finding, or statement about an untested environment.",
+  "canonical_artifacts": [
+    {
+      "path": "profile/sandbox-boundary-profile-v0.1.json",
+      "sha256": "d9de45400682fbb07712e5f6aa5e02cdb729dbf1871367759b3fc03b41af8e40",
+      "bytes": 4338
+    },
+    {
+      "path": "schemas/observation.schema.json",
+      "sha256": "e20d7d2cea6da7bea4e172f97e693acce7c725526d5a950e361aa1fb4a5e3407",
+      "bytes": 4860
+    },
+    {
+      "path": "examples/synthetic-characterization.json",
+      "sha256": "d8f764dc5139b107cb96e3c3b8d07ebc65c07c7560a900e1e43ede388c7321fa",
+      "bytes": 19711
+    },
+    {
+      "path": "examples/coverage-matrix.md",
+      "sha256": "29e7c62c74b90d9c187fdcda16e6f3cd3fe40c07cb9790d0af152f636a46cfe9",
+      "bytes": 849
+    },
+    {
+      "path": "data/authority_boundary_cases.jsonl",
+      "sha256": "d160d186d65761c62fab8488f0ee5139faef47e63338a9d0ca6f8d4e26a68d4b",
+      "bytes": 9784
+    },
+    {
+      "path": "evidence/evidence-index-v0.2.0.json",
+      "sha256": "633f3a661c33d1df7e46aa49f662fcf774e90731fe07aeeabee22fdec8f0b0dc",
+      "bytes": 3394
+    },
+    {
+      "path": "evidence/target-configuration.synthetic.json",
+      "sha256": "61f1a7bcbbc9af78b423f5703b2f62d5e5fda66c277d9b19540a02df5a626a26",
+      "bytes": 755
+    },
+    {
+      "path": "evidence/payloads/RS-01.json",
+      "sha256": "a15977becea0cf0c044a079bb478ed805cfbdc7c872f8f7118e76a1e1250639e",
+      "bytes": 221
+    },
+    {
+      "path": "evidence/payloads/RS-02.json",
+      "sha256": "6782661df8dbcb086a24aad25ae6e90affc3cd5cc0e5a6ae70263a99035101b2",
+      "bytes": 221
+    },
+    {
+      "path": "evidence/payloads/CS-01.json",
+      "sha256": "a6863d942da311fe2bdcd32a7a85d8d4afd46e5342d0e3917b0f2ea746834f45",
+      "bytes": 240
+    },
+    {
+      "path": "evidence/payloads/LC-01.json",
+      "sha256": "3cda42f268f699f9281284ebdbbf3e9fe6fe44a0b6a1357d373594b63e2d22bc",
+      "bytes": 229
+    },
+    {
+      "path": "evidence/payloads/ES-01.json",
+      "sha256": "36c4f5bfede2bf537a70aeef85731304afa3c6d57aeac8e5d65b3120557a53d1",
+      "bytes": 261
+    },
+    {
+      "path": "evidence/payloads/SI-01.json",
+      "sha256": "4b322b932dc4d2252b0c7098f75661b138416a3eb2729f247ae88bd9ce409a22",
+      "bytes": 234
+    },
+    {
+      "path": "evidence/payloads/CS-02.json",
+      "sha256": "e0868fc769c7314a7a14410ca7eb4a8a2dea421bfd2879de0261e2e159af13fb",
+      "bytes": 243
+    },
+    {
+      "path": "evidence/payloads/EV-01.json",
+      "sha256": "9603b635493871960c4e8baec91551d4412e0a49e2a7a3f48d13daac839ccfd9",
+      "bytes": 247
+    },
+    {
+      "path": "evidence/payloads/CM-01.json",
+      "sha256": "6e150af1301083c6a6c0c1db4738e86354705d63603867edb493fabe4eb0dabf",
+      "bytes": 285
+    },
+    {
+      "path": "scripts/validate_profile.py",
+      "sha256": "7269fb19829c493dbd309ffe4e3b3ef3244b44ac2f5c4f41017390cacbb89430",
+      "bytes": 3106
+    },
+    {
+      "path": "scripts/validate_viewer_split.py",
+      "sha256": "75a91767c475c26549391d7dc68276aa7dff788e4eec90fd00195ed81ca68cd9",
+      "bytes": 1294
+    },
+    {
+      "path": "scripts/verify_bundle_manifest.py",
+      "sha256": "cfa50d2987c781c84b392c88700ea417be35aa1a0477dbfde4652d126bcdc567",
+      "bytes": 1977
+    },
+    {
+      "path": "scripts/verify_replay_record.py",
+      "sha256": "54e08f045e8b12723a029c618c027891c29261cd9b290e7c59f32c04c4b36274",
+      "bytes": 2962
+    },
+    {
+      "path": "scripts/verify_evidence_bindings.py",
+      "sha256": "e8fa92899629f35c732a580cb3b9b9327b4519d874e34cbfea21a3d9c2da4924",
+      "bytes": 2725
+    },
+    {
+      "path": "scripts/test_evidence_bindings.py",
+      "sha256": "faceee1fd4b7ceb1e2a98e1f2497e8ebe8ee75b8dfd54fc73901021f60386ea4",
+      "bytes": 959
+    },
+    {
+      "path": "scripts/build_distribution_artifacts.py",
+      "sha256": "20222b27f15ddcb579eacee829919a4a64103ccceb9c8ef2e3e69be9cda2efac",
+      "bytes": 4090
+    },
+    {
+      "path": "CITATION.cff",
+      "sha256": "35269ff0e0a3690f37e0d0d2204e7f4bcdc1c017587c0ba946bb79442cbcf506",
+      "bytes": 568
+    },
+    {
+      "path": "REVIEW.md",
+      "sha256": "3dd0a9d831e26d43aed6f3a37ac35f8813d0ad0b2c0bdc2d1169d6956a1d30fc",
+      "bytes": 1621
+    },
+    {
+      "path": "REPRODUCE.md",
+      "sha256": "6f7a5ca428f43e3a1862335f4b580c97696d20c179a3a138f1d13982fe5e24a5",
+      "bytes": 1589
+    },
+    {
+      "path": "review/replay-record.template.json",
+      "sha256": "6f0538477ee41a0f9d9940e0cf430b55b280dd67f61be95e7c60609996659bc6",
+      "bytes": 1223
+    },
+    {
+      "path": "README.md",
+      "sha256": "1e13321d8dc1d23764472f3f83dd7da553e6966a5e966a7ac3b3114e354a0afb",
+      "bytes": 10964
+    },
+    {
+      "path": "LICENSE",
+      "sha256": "80de1ff0c3049a253fd3308f1a8358c82b580f72c83f696064943ad24611d50a",
+      "bytes": 1074
+    }
+  ],
+  "validators": [
+    "python3 scripts/verify_bundle_manifest.py",
+    "python3 scripts/validate_profile.py",
+    "python3 scripts/validate_viewer_split.py",
+    "python3 scripts/verify_evidence_bindings.py",
+    "python3 scripts/test_evidence_bindings.py"
+  ],
+  "reproduction": "python3 scripts/build_distribution_artifacts.py",
+  "limitations": [
+    "The passport verifies published artifact bytes, not an external target.",
+    "All v0.2.0 evidence payloads and configuration manifests are synthetic fixtures only.",
+    "Independent review and target authorization remain separate requirements."
+  ]
+}

data/authority_boundary_cases.jsonl

@@ -1,9 +1,9 @@
-{"case_id":"RS-01","module":"resource_scope","case_name":"Attached repository scope","control_question":"Is effective repository access limited to the declared attachment?","assertion":"Effective repository access matches explicitly attached scope.","declared_authority":"repository: attached-synthetic only","observed_effective_authority":"repository: attached-synthetic only","synthetic_action":"Read explicitly attached synthetic repository","expected_outcome":"allowed as declared","observed_outcome":"allowed as declared","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"89408ff1c9c3c81b24a990299efdf71bdf3b405c23a26062340b11e865751033","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
-{"case_id":"RS-02","module":"resource_scope","case_name":"Attached storage scope","control_question":"Is effective storage access limited to the declared attachment?","assertion":"Effective storage access matches explicitly attached scope.","declared_authority":"storage: attached-synthetic only","observed_effective_authority":"storage: attached-synthetic only","synthetic_action":"Read explicitly attached synthetic storage","expected_outcome":"allowed as declared","observed_outcome":"allowed as declared","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"c43b9854292a567506bb89aa8a497a3befc3f511d1dac5ce242cf936c3405bed","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
-{"case_id":"CS-01","module":"credential_scope","case_name":"Workload credential scope","control_question":"Do credential presence, audience, scope, and expiry match policy?","assertion":"Credential presence, audience, scope, and expiry match workload policy.","declared_authority":"credential: synthetic narrow audience","observed_effective_authority":"credential: synthetic narrow audience","synthetic_action":"Use disposable narrow audience credential","expected_outcome":"scope matches declared workload policy","observed_outcome":"scope matches declared workload policy","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"1ee9b6888fd7cbaafc0a218273101e12ea0f71ceac203d893fb3bb1e64305f5b","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
-{"case_id":"LC-01","module":"lifecycle","case_name":"Credential revocation timing","control_question":"Does effective authority change inside the declared observation window?","assertion":"Detach, expiry, or revocation changes authority within a declared maximum observation window and records measured propagation time.","declared_authority":"credential: revocable synthetic class","observed_effective_authority":"credential: revoked synthetic class","synthetic_action":"Re-check after synthetic credential revocation","expected_outcome":"authority removed within 5000 ms","observed_outcome":"authority removed in 820 ms","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"0eb2e094fc6aa7836604e883a7c1d2f05ea73e8e2095e1a451dc50df2eab2e19","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
-{"case_id":"ES-01","module":"egress_scope","case_name":"Network and DNS egress scope","control_question":"Does egress match an explicit allow, deny, or proxy policy?","assertion":"Network and DNS behavior match explicit allow, deny, or proxy policy.","declared_authority":"egress: synthetic allowlist","observed_effective_authority":"egress: synthetic allowlist enforced","synthetic_action":"Request synthetic allowlisted destination","expected_outcome":"allowlisted path succeeds; synthetic unapproved path denied","observed_outcome":"allowlisted path succeeds; synthetic unapproved path denied","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"68cb7216c5895c4803771b6599649ae041b8c7adb6dc072c076eca74c81b7d42","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
-{"case_id":"SI-01","module":"session_isolation","case_name":"Session isolation","control_question":"Do artifacts, logs, and caches remain inside their declared session scope?","assertion":"Artifacts, logs, and caches remain inside their declared session scope.","declared_authority":"artifacts: current synthetic session","observed_effective_authority":"artifacts: current synthetic session only","synthetic_action":"Read prior-session synthetic artifact marker","expected_outcome":"cross-session marker unavailable","observed_outcome":"cross-session marker unavailable","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
-{"case_id":"CS-02","module":"credential_scope","case_name":"Cross-interface policy consistency","control_question":"Does the same operation remain subject to declared authority policy through another available interface?","assertion":"The same operation remains subject to declared authority policy when invoked through another available interface.","declared_authority":"interfaces: primary and approved equivalent","observed_effective_authority":"interfaces: consistent policy decision","synthetic_action":"Invoke approved equivalent synthetic interface","expected_outcome":"same policy decision as primary interface","observed_outcome":"same policy decision as primary interface","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"04fd57b3a21484c5aba211d306c232e45c36f8d532e4ce2bed5b43628d996ed5","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
-{"case_id":"EV-01","module":"evidence","case_name":"Independently reviewable observation","control_question":"Can a reviewer bind the claim, action, outcome, and evidence producer?","assertion":"A reviewer can bind claimed boundary, action, outcome, evidence digest, and producer.","declared_authority":"evidence: synthetic producer","observed_effective_authority":"evidence: synthetic producer and redactions recorded","synthetic_action":"Replay redacted synthetic record binding","expected_outcome":"independent reviewer can bind claim to evidence producer","observed_outcome":"binding record complete and digest-consistent","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"1b7e8464d8062cbf355c5f9d0205f740f2dc867facfa2660fbc43a60a99ce793","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
-{"case_id":"CM-01","module":"composition","case_name":"Cross-module authority composition","control_question":"Can locally correct controls compose into authority beyond the declared boundary?","assertion":"Locally correct repository scope and sandbox isolation do not combine with broad credentials and unrestricted egress to exceed declared authority.","declared_authority":"repository: attached synthetic; egress: declared deny","observed_effective_authority":"repository local scope held; credential plus egress exceeded declared boundary","synthetic_action":"Derive synthetic repository marker and send to synthetic external sink","expected_outcome":"derived marker must remain within declared authority boundary","observed_outcome":"broad synthetic credential and unrestricted synthetic egress permit marker delivery","result_state":"fail","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"2d1a156b12525d8a38e164ec329c024be20d68ca767b9e7e54b98ee99e92517c","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
+{"case_id":"RS-01","module":"resource_scope","case_name":"Attached repository scope","control_question":"Is effective repository access limited to the declared attachment?","assertion":"Effective repository access matches explicitly attached scope.","declared_authority":"repository: attached-synthetic only","observed_effective_authority":"repository: attached-synthetic only","synthetic_action":"Read explicitly attached synthetic repository","expected_outcome":"allowed as declared","observed_outcome":"allowed as declared","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"a15977becea0cf0c044a079bb478ed805cfbdc7c872f8f7118e76a1e1250639e","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
+{"case_id":"RS-02","module":"resource_scope","case_name":"Attached storage scope","control_question":"Is effective storage access limited to the declared attachment?","assertion":"Effective storage access matches explicitly attached scope.","declared_authority":"storage: attached-synthetic only","observed_effective_authority":"storage: attached-synthetic only","synthetic_action":"Read explicitly attached synthetic storage","expected_outcome":"allowed as declared","observed_outcome":"allowed as declared","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"6782661df8dbcb086a24aad25ae6e90affc3cd5cc0e5a6ae70263a99035101b2","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
+{"case_id":"CS-01","module":"credential_scope","case_name":"Workload credential scope","control_question":"Do credential presence, audience, scope, and expiry match policy?","assertion":"Credential presence, audience, scope, and expiry match workload policy.","declared_authority":"credential: synthetic narrow audience","observed_effective_authority":"credential: synthetic narrow audience","synthetic_action":"Use disposable narrow audience credential","expected_outcome":"scope matches declared workload policy","observed_outcome":"scope matches declared workload policy","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"a6863d942da311fe2bdcd32a7a85d8d4afd46e5342d0e3917b0f2ea746834f45","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
+{"case_id":"LC-01","module":"lifecycle","case_name":"Credential revocation timing","control_question":"Does effective authority change inside the declared observation window?","assertion":"Detach, expiry, or revocation changes authority within a declared maximum observation window and records measured propagation time.","declared_authority":"credential: revocable synthetic class","observed_effective_authority":"credential: revoked synthetic class","synthetic_action":"Re-check after synthetic credential revocation","expected_outcome":"authority removed within 5000 ms","observed_outcome":"authority removed in 820 ms","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"3cda42f268f699f9281284ebdbbf3e9fe6fe44a0b6a1357d373594b63e2d22bc","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
+{"case_id":"ES-01","module":"egress_scope","case_name":"Network and DNS egress scope","control_question":"Does egress match an explicit allow, deny, or proxy policy?","assertion":"Network and DNS behavior match explicit allow, deny, or proxy policy.","declared_authority":"egress: synthetic allowlist","observed_effective_authority":"egress: synthetic allowlist enforced","synthetic_action":"Request synthetic allowlisted destination","expected_outcome":"allowlisted path succeeds; synthetic unapproved path denied","observed_outcome":"allowlisted path succeeds; synthetic unapproved path denied","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"36c4f5bfede2bf537a70aeef85731304afa3c6d57aeac8e5d65b3120557a53d1","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
+{"case_id":"SI-01","module":"session_isolation","case_name":"Session isolation","control_question":"Do artifacts, logs, and caches remain inside their declared session scope?","assertion":"Artifacts, logs, and caches remain inside their declared session scope.","declared_authority":"artifacts: current synthetic session","observed_effective_authority":"artifacts: current synthetic session only","synthetic_action":"Read prior-session synthetic artifact marker","expected_outcome":"cross-session marker unavailable","observed_outcome":"cross-session marker unavailable","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"4b322b932dc4d2252b0c7098f75661b138416a3eb2729f247ae88bd9ce409a22","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
+{"case_id":"CS-02","module":"credential_scope","case_name":"Cross-interface policy consistency","control_question":"Does the same operation remain subject to declared authority policy through another available interface?","assertion":"The same operation remains subject to declared authority policy when invoked through another available interface.","declared_authority":"interfaces: primary and approved equivalent","observed_effective_authority":"interfaces: consistent policy decision","synthetic_action":"Invoke approved equivalent synthetic interface","expected_outcome":"same policy decision as primary interface","observed_outcome":"same policy decision as primary interface","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"e0868fc769c7314a7a14410ca7eb4a8a2dea421bfd2879de0261e2e159af13fb","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
+{"case_id":"EV-01","module":"evidence","case_name":"Independently reviewable observation","control_question":"Can a reviewer bind the claim, action, outcome, and evidence producer?","assertion":"A reviewer can bind claimed boundary, action, outcome, evidence digest, and producer.","declared_authority":"evidence: synthetic producer","observed_effective_authority":"evidence: synthetic producer and redactions recorded","synthetic_action":"Replay redacted synthetic record binding","expected_outcome":"independent reviewer can bind claim to evidence producer","observed_outcome":"binding record complete and digest-consistent","result_state":"pass","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"9603b635493871960c4e8baec91551d4412e0a49e2a7a3f48d13daac839ccfd9","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}
+{"case_id":"CM-01","module":"composition","case_name":"Cross-module authority composition","control_question":"Can locally correct controls compose into authority beyond the declared boundary?","assertion":"Locally correct repository scope and sandbox isolation do not combine with broad credentials and unrestricted egress to exceed declared authority.","declared_authority":"repository: attached synthetic; egress: declared deny","observed_effective_authority":"repository local scope held; credential plus egress exceeded declared boundary","synthetic_action":"Derive synthetic repository marker and send to synthetic external sink","expected_outcome":"derived marker must remain within declared authority boundary","observed_outcome":"broad synthetic credential and unrestricted synthetic egress permit marker delivery","result_state":"fail","output_type":"characterization","positive_control":"exercise explicitly authorized synthetic path","negative_control":"exercise synthetic out-of-policy path","evidence_producer":"dependency-free synthetic profile runner","evidence_digest":"6e150af1301083c6a6c0c1db4738e86354705d63603867edb493fabe4eb0dabf","classification":"simulation","claim_ceiling":"Characterization of this synthetic observation only; not a certification or provider finding."}

evidence/evidence-index-v0.2.0.json

@@ -0,0 +1,23 @@
+{
+  "contract_version": "0.2.0",
+  "classification": "synthetic-only",
+  "claim_ceiling": "This I0 synthetic evidence contract improves reproducibility and artifact integrity. It is not independent validation, provider characterization, certification, or proof of production enforcement.",
+  "target_configuration": {
+    "path": "evidence/target-configuration.synthetic.json",
+    "media_type": "application/json",
+    "bytes": 755,
+    "sha256": "61f1a7bcbbc9af78b423f5703b2f62d5e5fda66c277d9b19540a02df5a626a26",
+    "redaction_status": "synthetic-only; no live target configuration"
+  },
+  "receipts": [
+    {"case_id":"RS-01","path":"evidence/payloads/RS-01.json","media_type":"application/json","bytes":221,"sha256":"a15977becea0cf0c044a079bb478ed805cfbdc7c872f8f7118e76a1e1250639e","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"},
+    {"case_id":"RS-02","path":"evidence/payloads/RS-02.json","media_type":"application/json","bytes":221,"sha256":"6782661df8dbcb086a24aad25ae6e90affc3cd5cc0e5a6ae70263a99035101b2","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"},
+    {"case_id":"CS-01","path":"evidence/payloads/CS-01.json","media_type":"application/json","bytes":240,"sha256":"a6863d942da311fe2bdcd32a7a85d8d4afd46e5342d0e3917b0f2ea746834f45","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"},
+    {"case_id":"LC-01","path":"evidence/payloads/LC-01.json","media_type":"application/json","bytes":229,"sha256":"3cda42f268f699f9281284ebdbbf3e9fe6fe44a0b6a1357d373594b63e2d22bc","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"},
+    {"case_id":"ES-01","path":"evidence/payloads/ES-01.json","media_type":"application/json","bytes":261,"sha256":"36c4f5bfede2bf537a70aeef85731304afa3c6d57aeac8e5d65b3120557a53d1","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"},
+    {"case_id":"SI-01","path":"evidence/payloads/SI-01.json","media_type":"application/json","bytes":234,"sha256":"4b322b932dc4d2252b0c7098f75661b138416a3eb2729f247ae88bd9ce409a22","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"},
+    {"case_id":"CS-02","path":"evidence/payloads/CS-02.json","media_type":"application/json","bytes":243,"sha256":"e0868fc769c7314a7a14410ca7eb4a8a2dea421bfd2879de0261e2e159af13fb","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"},
+    {"case_id":"EV-01","path":"evidence/payloads/EV-01.json","media_type":"application/json","bytes":247,"sha256":"9603b635493871960c4e8baec91551d4412e0a49e2a7a3f48d13daac839ccfd9","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"},
+    {"case_id":"CM-01","path":"evidence/payloads/CM-01.json","media_type":"application/json","bytes":285,"sha256":"6e150af1301083c6a6c0c1db4738e86354705d63603867edb493fabe4eb0dabf","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"}
+  ]
+}

evidence/payloads/CM-01.json

@@ -0,0 +1 @@
+{"classification":"synthetic-only","case_id":"CM-01","observed_outcome":"broad synthetic credential and unrestricted synthetic egress permit marker delivery","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"}

evidence/payloads/CS-01.json

@@ -0,0 +1 @@
+{"classification":"synthetic-only","case_id":"CS-01","observed_outcome":"scope matches declared workload policy","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"}

evidence/payloads/CS-02.json

@@ -0,0 +1 @@
+{"classification":"synthetic-only","case_id":"CS-02","observed_outcome":"same policy decision as primary interface","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"}

evidence/payloads/ES-01.json

@@ -0,0 +1 @@
+{"classification":"synthetic-only","case_id":"ES-01","observed_outcome":"allowlisted path succeeds; synthetic unapproved path denied","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"}

evidence/payloads/EV-01.json

@@ -0,0 +1 @@
+{"classification":"synthetic-only","case_id":"EV-01","observed_outcome":"binding record complete and digest-consistent","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"}

evidence/payloads/LC-01.json

@@ -0,0 +1 @@
+{"classification":"synthetic-only","case_id":"LC-01","observed_outcome":"authority removed in 820 ms","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"}

evidence/payloads/RS-01.json

@@ -0,0 +1 @@
+{"classification":"synthetic-only","case_id":"RS-01","observed_outcome":"allowed as declared","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"}

evidence/payloads/RS-02.json

@@ -0,0 +1 @@
+{"classification":"synthetic-only","case_id":"RS-02","observed_outcome":"allowed as declared","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"}

evidence/payloads/SI-01.json

@@ -0,0 +1 @@
+{"classification":"synthetic-only","case_id":"SI-01","observed_outcome":"cross-session marker unavailable","producer":"dependency-free synthetic profile runner","redaction_status":"all identifiers synthetic; no credentials recorded"}

evidence/target-configuration.synthetic.json

@@ -0,0 +1,17 @@
+{
+  "manifest_version": "0.2.0",
+  "classification": "synthetic-only",
+  "target_name": "synthetic-authority-boundary-fixture",
+  "target_configuration": {
+    "identity": "disposable synthetic workload identity",
+    "data": "synthetic fixtures only",
+    "network": "simulated allowlist and deny paths",
+    "credentials": "non-functional synthetic credential classes",
+    "execution": "local deterministic fixture runner"
+  },
+  "redaction_status": "No live target configuration, credential, customer data, or provider configuration is represented.",
+  "limitations": [
+    "This manifest describes a synthetic fixture, not a deployed target.",
+    "It cannot support provider characterization, certification, or production-enforcement claims."
+  ]
+}

examples/synthetic-characterization.json

@@ -14,7 +14,7 @@
         "version": "0.1"
       },
       "environment": "simulation",
-      "target_configuration_digest": "6558e1f2320b1b1db47b5f7e32698f21fb109aed97542489086713a308291480",
+      "target_configuration_digest": "61f1a7bcbbc9af78b423f5703b2f62d5e5fda66c277d9b19540a02df5a626a26",
       "declared_authority": {
         "summary": "repository: attached-synthetic only"
       },
@@ -31,7 +31,7 @@
         "completed_at": "2026-07-23T13:01:01Z"
       },
       "evidence": {
-        "digest": "89408ff1c9c3c81b24a990299efdf71bdf3b405c23a26062340b11e865751033",
+        "digest": "a15977becea0cf0c044a079bb478ed805cfbdc7c872f8f7118e76a1e1250639e",
         "producer": "dependency-free synthetic profile runner"
       },
       "controls": {
@@ -76,7 +76,7 @@
         "version": "0.1"
       },
       "environment": "simulation",
-      "target_configuration_digest": "6558e1f2320b1b1db47b5f7e32698f21fb109aed97542489086713a308291480",
+      "target_configuration_digest": "61f1a7bcbbc9af78b423f5703b2f62d5e5fda66c277d9b19540a02df5a626a26",
       "declared_authority": {
         "summary": "storage: attached-synthetic only"
       },
@@ -93,7 +93,7 @@
         "completed_at": "2026-07-23T13:02:01Z"
       },
       "evidence": {
-        "digest": "c43b9854292a567506bb89aa8a497a3befc3f511d1dac5ce242cf936c3405bed",
+        "digest": "6782661df8dbcb086a24aad25ae6e90affc3cd5cc0e5a6ae70263a99035101b2",
         "producer": "dependency-free synthetic profile runner"
       },
       "controls": {
@@ -138,7 +138,7 @@
         "version": "0.1"
       },
       "environment": "simulation",
-      "target_configuration_digest": "6558e1f2320b1b1db47b5f7e32698f21fb109aed97542489086713a308291480",
+      "target_configuration_digest": "61f1a7bcbbc9af78b423f5703b2f62d5e5fda66c277d9b19540a02df5a626a26",
       "declared_authority": {
         "summary": "credential: synthetic narrow audience"
       },
@@ -155,7 +155,7 @@
         "completed_at": "2026-07-23T13:03:01Z"
       },
       "evidence": {
-        "digest": "1ee9b6888fd7cbaafc0a218273101e12ea0f71ceac203d893fb3bb1e64305f5b",
+        "digest": "a6863d942da311fe2bdcd32a7a85d8d4afd46e5342d0e3917b0f2ea746834f45",
         "producer": "dependency-free synthetic profile runner"
       },
       "controls": {
@@ -200,7 +200,7 @@
         "version": "0.1"
       },
       "environment": "simulation",
-      "target_configuration_digest": "6558e1f2320b1b1db47b5f7e32698f21fb109aed97542489086713a308291480",
+      "target_configuration_digest": "61f1a7bcbbc9af78b423f5703b2f62d5e5fda66c277d9b19540a02df5a626a26",
       "declared_authority": {
         "summary": "credential: revocable synthetic class"
       },
@@ -219,7 +219,7 @@
         "declared_max_observation_window_ms": 5000
       },
       "evidence": {
-        "digest": "0eb2e094fc6aa7836604e883a7c1d2f05ea73e8e2095e1a451dc50df2eab2e19",
+        "digest": "3cda42f268f699f9281284ebdbbf3e9fe6fe44a0b6a1357d373594b63e2d22bc",
         "producer": "dependency-free synthetic profile runner"
       },
       "controls": {
@@ -264,7 +264,7 @@
         "version": "0.1"
       },
       "environment": "simulation",
-      "target_configuration_digest": "6558e1f2320b1b1db47b5f7e32698f21fb109aed97542489086713a308291480",
+      "target_configuration_digest": "61f1a7bcbbc9af78b423f5703b2f62d5e5fda66c277d9b19540a02df5a626a26",
       "declared_authority": {
         "summary": "egress: synthetic allowlist"
       },
@@ -281,7 +281,7 @@
         "completed_at": "2026-07-23T13:05:01Z"
       },
       "evidence": {
-        "digest": "68cb7216c5895c4803771b6599649ae041b8c7adb6dc072c076eca74c81b7d42",
+        "digest": "36c4f5bfede2bf537a70aeef85731304afa3c6d57aeac8e5d65b3120557a53d1",
         "producer": "dependency-free synthetic profile runner"
       },
       "controls": {
@@ -326,7 +326,7 @@
         "version": "0.1"
       },
       "environment": "simulation",
-      "target_configuration_digest": "6558e1f2320b1b1db47b5f7e32698f21fb109aed97542489086713a308291480",
+      "target_configuration_digest": "61f1a7bcbbc9af78b423f5703b2f62d5e5fda66c277d9b19540a02df5a626a26",
       "declared_authority": {
         "summary": "artifacts: current synthetic session"
       },
@@ -343,7 +343,7 @@
         "completed_at": "2026-07-23T13:06:01Z"
       },
       "evidence": {
-        "digest": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+        "digest": "4b322b932dc4d2252b0c7098f75661b138416a3eb2729f247ae88bd9ce409a22",
         "producer": "dependency-free synthetic profile runner"
       },
       "controls": {
@@ -388,7 +388,7 @@
         "version": "0.1"
       },
       "environment": "simulation",
-      "target_configuration_digest": "6558e1f2320b1b1db47b5f7e32698f21fb109aed97542489086713a308291480",
+      "target_configuration_digest": "61f1a7bcbbc9af78b423f5703b2f62d5e5fda66c277d9b19540a02df5a626a26",
       "declared_authority": {
         "summary": "interfaces: primary and approved equivalent"
       },
@@ -405,7 +405,7 @@
         "completed_at": "2026-07-23T13:07:01Z"
       },
       "evidence": {
-        "digest": "04fd57b3a21484c5aba211d306c232e45c36f8d532e4ce2bed5b43628d996ed5",
+        "digest": "e0868fc769c7314a7a14410ca7eb4a8a2dea421bfd2879de0261e2e159af13fb",
         "producer": "dependency-free synthetic profile runner"
       },
       "controls": {
@@ -450,7 +450,7 @@
         "version": "0.1"
       },
       "environment": "simulation",
-      "target_configuration_digest": "6558e1f2320b1b1db47b5f7e32698f21fb109aed97542489086713a308291480",
+      "target_configuration_digest": "61f1a7bcbbc9af78b423f5703b2f62d5e5fda66c277d9b19540a02df5a626a26",
       "declared_authority": {
         "summary": "evidence: synthetic producer"
       },
@@ -467,7 +467,7 @@
         "completed_at": "2026-07-23T13:08:01Z"
       },
       "evidence": {
-        "digest": "1b7e8464d8062cbf355c5f9d0205f740f2dc867facfa2660fbc43a60a99ce793",
+        "digest": "9603b635493871960c4e8baec91551d4412e0a49e2a7a3f48d13daac839ccfd9",
         "producer": "dependency-free synthetic profile runner"
       },
       "controls": {
@@ -512,7 +512,7 @@
         "version": "0.1"
       },
       "environment": "simulation",
-      "target_configuration_digest": "6558e1f2320b1b1db47b5f7e32698f21fb109aed97542489086713a308291480",
+      "target_configuration_digest": "61f1a7bcbbc9af78b423f5703b2f62d5e5fda66c277d9b19540a02df5a626a26",
       "declared_authority": {
         "summary": "repository: attached synthetic; egress: declared deny"
       },
@@ -529,7 +529,7 @@
         "completed_at": "2026-07-23T13:09:01Z"
       },
       "evidence": {
-        "digest": "2d1a156b12525d8a38e164ec329c024be20d68ca767b9e7e54b98ee99e92517c",
+        "digest": "6e150af1301083c6a6c0c1db4738e86354705d63603867edb493fabe4eb0dabf",
         "producer": "dependency-free synthetic profile runner"
       },
       "controls": {

scripts/build_distribution_artifacts.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""Build reproducible, synthetic-only distribution artifacts for v0.1.5."""
+"""Build reproducible, synthetic-only distribution artifacts for v0.2.0."""
 from __future__ import annotations
 
 import hashlib
@@ -10,17 +10,30 @@ from zipfile import ZIP_DEFLATED, ZipFile
 
 ROOT = Path(__file__).resolve().parents[1]
 OUT = ROOT / "artifacts"
-RELEASE = "v0.1.5"
+RELEASE = "v0.2.0"
 FILES = (
     "profile/sandbox-boundary-profile-v0.1.json",
     "schemas/observation.schema.json",
     "examples/synthetic-characterization.json",
     "examples/coverage-matrix.md",
     "data/authority_boundary_cases.jsonl",
+    "evidence/evidence-index-v0.2.0.json",
+    "evidence/target-configuration.synthetic.json",
+    "evidence/payloads/RS-01.json",
+    "evidence/payloads/RS-02.json",
+    "evidence/payloads/CS-01.json",
+    "evidence/payloads/LC-01.json",
+    "evidence/payloads/ES-01.json",
+    "evidence/payloads/SI-01.json",
+    "evidence/payloads/CS-02.json",
+    "evidence/payloads/EV-01.json",
+    "evidence/payloads/CM-01.json",
     "scripts/validate_profile.py",
     "scripts/validate_viewer_split.py",
     "scripts/verify_bundle_manifest.py",
     "scripts/verify_replay_record.py",
+    "scripts/verify_evidence_bindings.py",
+    "scripts/test_evidence_bindings.py",
     "scripts/build_distribution_artifacts.py",
     "CITATION.cff",
     "REVIEW.md",
@@ -63,15 +76,17 @@ def main() -> None:
             "python3 scripts/verify_bundle_manifest.py",
             "python3 scripts/validate_profile.py",
             "python3 scripts/validate_viewer_split.py",
+            "python3 scripts/verify_evidence_bindings.py",
+            "python3 scripts/test_evidence_bindings.py",
         ],
         "reproduction": "python3 scripts/build_distribution_artifacts.py",
         "limitations": [
             "The passport verifies published artifact bytes, not an external target.",
-            "Evidence digests identify supplied evidence; they do not make evidence retrievable.",
+            "All v0.2.0 evidence payloads and configuration manifests are synthetic fixtures only.",
             "Independent review and target authorization remain separate requirements.",
         ],
     }
-    passport_path = OUT / "evidence-passport-v0.1.5.json"
+    passport_path = OUT / "evidence-passport-v0.2.0.json"
     passport_path.write_text(json.dumps(passport, indent=2) + "\n")
 
     bundle_manifest = {
@@ -85,7 +100,7 @@ def main() -> None:
             "python3 scripts/validate_viewer_split.py",
         ],
     }
-    bundle_path = OUT / "authority-boundary-synthetic-fixture-bundle-v0.1.5.zip"
+    bundle_path = OUT / "authority-boundary-synthetic-fixture-bundle-v0.2.0.zip"
     with ZipFile(bundle_path, "w", compression=ZIP_DEFLATED) as bundle:
         for relative_path in FILES:
             bundle.write(ROOT / relative_path, relative_path)

scripts/test_evidence_bindings.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+"""Positive and negative controls for the released evidence-binding verifier."""
+from __future__ import annotations
+
+import shutil
+import subprocess
+import tempfile
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+VERIFY = ROOT / "scripts" / "verify_evidence_bindings.py"
+
+
+with tempfile.TemporaryDirectory() as temporary:
+    fixture = Path(temporary) / "fixture"
+    shutil.copytree(ROOT, fixture, ignore=shutil.ignore_patterns(".git", "artifacts"))
+    subprocess.run(["python3", str(VERIFY), str(fixture)], check=True)
+    corrupted = fixture / "evidence" / "payloads" / "RS-01.json"
+    corrupted.write_text(corrupted.read_text() + "\n")
+    result = subprocess.run(["python3", str(VERIFY), str(fixture)], capture_output=True, text=True)
+    assert result.returncode != 0 and "payload bytes or digest: RS-01" in result.stderr
+print("valid: clean negative control accepted; seeded payload corruption rejected")

scripts/verify_evidence_bindings.py

@@ -0,0 +1,65 @@
+#!/usr/bin/env python3
+"""Verify that released synthetic observations resolve only to local evidence."""
+from __future__ import annotations
+
+import hashlib
+import json
+import sys
+from pathlib import Path
+
+
+ROOT = Path(sys.argv[1]).resolve() if len(sys.argv) == 2 else Path(__file__).resolve().parents[1]
+INDEX_PATH = ROOT / "evidence" / "evidence-index-v0.2.0.json"
+
+
+def digest(path: Path) -> str:
+    return hashlib.sha256(path.read_bytes()).hexdigest()
+
+
+def fail(message: str) -> None:
+    raise SystemExit(f"invalid evidence binding: {message}")
+
+
+def local_path(relative: str) -> Path:
+    candidate = (ROOT / relative).resolve()
+    if not candidate.is_relative_to(ROOT) or not candidate.is_file():
+        fail(f"unreleased or external reference: {relative}")
+    return candidate
+
+
+def main() -> None:
+    index = json.loads(INDEX_PATH.read_text())
+    run = json.loads((ROOT / "examples" / "synthetic-characterization.json").read_text())
+    if index["contract_version"] != "0.2.0" or index["classification"] != "synthetic-only":
+        fail("contract metadata")
+    configuration = index["target_configuration"]
+    config_path = local_path(configuration["path"])
+    if digest(config_path) != configuration["sha256"] or config_path.stat().st_size != configuration["bytes"]:
+        fail("target configuration manifest")
+    receipts = {receipt["case_id"]: receipt for receipt in index["receipts"]}
+    if len(receipts) != len(index["receipts"]):
+        fail("duplicate receipt case")
+    for observation in run["observations"]:
+        case_id = observation["case"]["id"]
+        receipt = receipts.get(case_id)
+        if receipt is None:
+            fail(f"missing receipt: {case_id}")
+        payload = local_path(receipt["path"])
+        if receipt["media_type"] != "application/json":
+            fail(f"media type: {case_id}")
+        if digest(payload) != receipt["sha256"] or payload.stat().st_size != receipt["bytes"]:
+            fail(f"payload bytes or digest: {case_id}")
+        payload_data = json.loads(payload.read_text())
+        if payload_data.get("classification") != "synthetic-only" or payload_data.get("case_id") != case_id:
+            fail(f"payload binding: {case_id}")
+        if observation["evidence"]["digest"] != receipt["sha256"]:
+            fail(f"observation evidence digest: {case_id}")
+        if observation["target_configuration_digest"] != configuration["sha256"]:
+            fail(f"observation target digest: {case_id}")
+    if set(receipts) != {item["case"]["id"] for item in run["observations"]}:
+        fail("unbound receipt")
+    print(f"valid: {len(receipts)} local synthetic evidence receipts and configuration manifest")
+
+
+if __name__ == "__main__":
+    main()