T81 Foundation

Release Readiness Packet (2026-03)

Status: GO (Decisioned) Date (UTC): 2026-02-28 Owner: Release / Governance

Decision (UTC): 2026-02-26 03:10:00Z Approver: @t81dev Decision: HOLD

Re-evaluation (UTC): 2026-02-28T00:00:00Z Approver: PM / @t81dev Decision: GO Basis: Both required branch-protection contexts are completed + success on candidate 1ec312e3. Non-required failure (build / Jekyll Pages) classified as Deferred — pre-existing Liquid rendering issue in third_party/llama.cpp modelcard templates; no impact on C++ release artifact, determinism, or DCP guarantees. All determinism gates, cross-arch bit-identity gates, sanitizer builds, fuzz, formal verification, and governance-metrics checks passed. Release may proceed on 1ec312e3.

Purpose

Consolidate release-governance evidence for the March packet cycle and preserve GO/HOLD decision-stamp continuity.

Scope

This packet captures governance evidence, decision fields, and required-context verification method alignment. It does not alter CI policy, runtime semantics, or freeze boundaries.

Decision-Stamp Continuity

• Packet cycle 2026-02 includes explicit Decision (UTC), Approver, and Decision fields.
• Packet cycle 2026-03 retains the same required decision-stamp fields.
• GO/HOLD basis remains tied to required branch-protection context status.

Required-Context Verification (Procedure Alignment)

• Required contexts (branch protection):
  • quality gate / required
  • Analyze (cpp)
• Verification method:
  • gh api repos/t81dev/t81-foundation/branches/main/protection --jq '.required_status_checks.contexts'
  • gh api repos/t81dev/t81-foundation/commits/<sha>/check-runs
• Decision rule:
  • GO only when all required contexts are completed and success.
  • Otherwise HOLD.

Decision Basis

• Current packet is issued as HOLD pending a release-candidate SHA with completed required-context verification evidence.
• No freeze model changes are introduced by this packet.
• Determinism and DCP boundaries remain unchanged.

AGI-Facing Boundary Classification (Cycle Declaration)

• third_party/llama.cpp integration path (t81_llama_adapter, CLI llama-run) is classified as: governed non-DCP.
• Classification rationale:
  • AGI-facing inference/policy integration surface.
  • Outside DCP-certified deterministic core.
  • Determinism claims remain bounded to practical reproducibility evidence and do not imply registry-Verified deterministic guarantees.
• Promotion requirement:
  • Any upgrade beyond governed non-DCP must follow docs/status/GOVERNED_AGI_PROMOTION_PIPELINE.md and corresponding registry/threat-model updates.

Candidate Verification Snapshot (2026-02-26, refreshed at 13:44:01Z) — SUPERSEDED

• Candidate SHA: b4fdf8efdf249e391f7c93fb18cf9245926b6a38 — SUPERSEDED by 1ec312e3.
• Decision implication at time of snapshot: GO criteria not met. Packet held.

Candidate Verification Snapshot (2026-02-28)

• Candidate SHA selected: 1ec312e3 (origin/main, HEAD as of 2026-02-28)
• Required contexts configured on main (confirmed via branch protection API):
  • quality gate / required
  • Analyze (cpp)
• Required-context verification results for 1ec312e3:
  • quality gate / required: completed / success ✅
  • Analyze (cpp): completed / success ✅
• Additional check-run results (non-required, informational):
  • gate / t81lang cross-arch bit-identity: completed / success
  • gate / t3k cross-arch bit-identity: completed / success
  • gate / tritwise-determinism / no-simd: completed / success
  • gate / tritwise-determinism / avx2-asan: completed / success
  • gate / determinism slice / linux-x86_64 / clang: completed / success
  • build / macos-x86_64 / gcc, build / macos-arm64 / clang, build / linux-x86_64 / gcc, build / linux-x86_64 / clang, build / linux-arm64 / clang: all completed / success
  • build / sanitizers: completed / success
  • static analysis / clang-tidy: completed / success
  • fuzzing / frontend: completed / success
  • formal verification / ternary logic: completed / success
  • benchmark / linux-x86_64, benchmark / vm workload gate: completed / success
  • cxx-std / linux-x86_64 / clang / ON, cxx-std / linux-x86_64 / clang / OFF: completed / success
  • governance-metrics, lint / spec & docs, contract-sync, format / clang-format: completed / success
  • architecture / invariants (informational), product / dcp integrity (informational): completed / success
• Non-required failure:
  • build (GitHub Pages / Jekyll): completed / failure — run 22514402961
  • Root cause: Jekyll renders third_party/llama.cpp/examples/model-conversion/scripts/embedding/modelcard.template which contains Liquid `` syntax, causing a Jekyll Liquid rendering error. This is a pre-existing Pages build issue unrelated to C++ correctness, determinism, or release quality.
  • Classification: Deferred — non-required workflow; does not block C++ release artifact. Tracking note: file an issue to suppress or exclude third_party/ from Jekyll rendering scope.
• Decision implication:
  • Both required contexts are completed + success.
  • GO criteria are met for 1ec312e3.
  • Non-required failure classified as deferred per release discipline.

Open Blocking Items

1. Resolve required-context evidence mismatch for b4fdf8efdf249e391f7c93fb18cf9245926b6a38 Resolved: candidate SHA replaced with 1ec312e3.
2. Land workflow trigger remediation Completed 2026-02-26 (ad6c2777): .github/workflows/codeql.yml now includes push trigger on main.
3. Capture Analyze (cpp) as explicit completed + success Completed 2026-02-28: Analyze (cpp) is completed / success on 1ec312e3.
4. Re-evaluate GO/HOLD GO criteria met on 1ec312e3 as of 2026-02-28. Pending final @t81dev decision stamp to convert recommendation to decision.

Follow-Up (Non-Blocking)

• File issue to exclude third_party/ from Jekyll Pages rendering scope to resolve the build (Pages) non-required failure on future candidates.

Release Manager Checklist Pointers

• docs/product/RELEASE_DISCIPLINE.md
• docs/status/RELEASE_DISCIPLINE_CHECKLIST.md
• .github/RELEASE_TEMPLATE.md

Versioning Statement

This packet is a time-bound release-governance artifact and does not override the authority model, freeze policy, or determinism registry boundaries.

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