{
 "schema": "arcifact-commitments/1",
 "note": "Append-only. Each entry carries the hash of the one before it. The log proves nothing about events before entry 1.",
 "anchor": {
  "kind": "rfc3161-timestamp",
  "subject": "this log's signed head",
  "how_to_check": "Take the head from signature.head, write it to a file with no trailing newline, and verify the timestamp tokens distributed with any Arcifact record: openssl ts -verify -data commitment-head.txt -in anchor-digicert.tsr -CApath /etc/ssl/certs. Two independent authorities sign it.",
  "why": "The head is the terminus of a hash chain over every entry, so a head that existed at a moment could only have come from a log that existed then. No Arcifact key is involved: the signatures are the authorities' own.",
  "limits": [
   "every timestamp INSIDE this file is issuer-stated; only the RFC 3161 tokens are independent",
   "the tokens prove the head existed, not that any particular entry is meaningful",
   "verifying them needs the token files, which ship with each record, and openssl"
  ]
 },
 "entries": [
  {
   "n": 1,
   "utc": "2026-08-16T15:38:27Z",
   "kind": "policy",
   "subject": "commitment log opened",
   "claim": "This log begins now. It proves nothing about any run, bar or bank that predates entry 1, and no past result should be read as strengthened by it.",
   "digest": "",
   "prev": "0000000000000000000000000000000000000000000000000000000000000000",
   "entry_hash": "0ed2157a180888197c3bb1a1e6872ae26e2d281f802f2d8d49425e1ab414154e"
  },
  {
   "n": 2,
   "utc": "2026-08-16T15:38:27Z",
   "kind": "artifact",
   "subject": "Arcifact Gate analyser cli.py",
   "claim": "The exact analyser bytes used for every Gate finding issued from this date. A later finding claiming this version must recompute to this digest.",
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  {
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   "utc": "2026-08-16T15:38:27Z",
   "kind": "artifact",
   "subject": "Gate expression engine gexpr.py",
   "claim": "The expression evaluator that decides fail-open predicates. Committed separately because a change here changes what the analyser can conclude.",
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   "kind": "artifact",
   "subject": "arcifact-report/1 envelope schema",
   "claim": "The record format every instrument emits. Committed so a future record cannot claim conformance to a schema that was quietly altered.",
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   "kind": "bar",
   "subject": "Gate finding bar, from this date",
   "claim": "A Gate finding is only reported as a proven gap when: the gate is an enforced required check resolved from a supplied required-check list; the uncovered job is not in needs, not reachable to the gate, and has no inspected dependent; the job is not marked continue-on-error; and the finding reproduces in both exact and closure modes. Anything else is reported as advisory, unresolved, or not analysed.",
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   "claim": "Analyser bytes in force from this entry. Findings issued earlier were produced by the digest at entry 2.",
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   "claim": "Engine bytes, now emitting analyser self-binding in every certificate.",
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   "subject": "Gate cli.py",
   "claim": "Analyser bytes in force from this entry. Supersedes entry 6. Adds inert gates, tolerant comparisons, status-function misuse, gates inspecting nothing, fail-fast compounds, orphan contexts, matrix naming and unread subgraphs.",
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   "claim": "Counterexample synthesiser. Constructs a concrete world in which the uncovered job fails and the gate is green, then evaluates the gate's own condition under it and emits nothing if the gate would go red.",
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  {
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   "kind": "artifact",
   "subject": "Gate repo.py",
   "claim": "Repository-level closure. Expands local reusable workflows, finds callee jobs that cannot fail their caller, and resolves required contexts across all workflows.",
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   "subject": "Counterexample bar, from this entry",
   "claim": "A counterexample is emitted only when the gate's own condition, evaluated under the constructed world by the expression engine, leaves the gate green. If the gate would go red, or the condition cannot be modelled, nothing is emitted. Assumptions about other jobs' outputs are recorded in the counterexample itself.",
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   "subject": "Gate build manifest (all producing modules)",
   "claim": "A single digest over the sha256 of every module that can produce a Gate record: cli.py, core.py, gexpr.py, counterexample.py, repo.py, sensitivity.py. Listing two files by hand let a record carry evidence from components it did not name. A record issued after this entry binds this manifest.",
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