Here’s a compact, practical pattern for making runtime traces auditable end‑to‑end—so every stack frame ties back to a signed build and can be replayed deterministically.

# Why this matters (in plain terms)

When something crashes or behaves oddly, you want to prove **which code** actually ran, **who built it**, **with what flags**, and **replay it**. The pattern below links: **trace → symbol bundle → build artifact → signed provenance**, and stores small “replay harness” contracts so auditors (or future you) can reproduce the run.

---

## 1) Join model: trace → symbols → artifacts → provenance

Use content‑addressed keys that already exist in your toolchain:

* Frames: instruction pointer (IP), build‑id
* Symbols: symbol bundle hash (e.g., `sha256` of PDB/dSYM/ELF DWARF bundle)
* Artifacts: release image/object `sha256`, compiler, flags, commit
* Provenance: DSSE envelope + Rekor inclusion proof (tile ref)

**SQL pattern (drop‑in for Postgres):**

```sql
SELECT
  f.trace_id,
  f.frame_index,
  f.ip,
  f.resolved_symbol,
  s.sha256 AS symbol_bundle,
  a.artifact_id,
  a.builder_commit,
  a.compiler,
  a.compiler_flags,
  a.provenance_dsse
FROM frames f
JOIN symbol_bundles s
  ON f.symbol_bundle_sha256 = s.sha256
JOIN artifacts a
  ON s.origin_artifact_sha256 = a.sha256
WHERE f.trace_id = $1
ORDER BY f.frame_index;
```

This yields a per‑frame audit trail from **IP → symbol → artifact → signed provenance**.

**Content‑addressed keys you can leverage:**

* Linux: function blob `sha256`, `build-id` note
* Windows: PDB `GUID+Age`
* macOS: dSYM `UUID`
* OCI: layer/config `sha256`

---

## 2) Minimal “replay harness” contract (store per trace/run)

Keep a tiny JSON alongside the trace row (e.g., `replays.replay_manifest JSONB`). It pins environment, symbols, and evidence pointers:

```json
{
  "harness_version": "1",
  "os": "linux|windows|macos",
  "kernel_version": "5.x|10.x|..",
  "libc_version": "glibc 2.3.4",
  "compiler": "gcc 12.1",
  "compiler_flags": "-g -O2 -fno-omit-frame-pointer",
  "build_id": "<id>",
  "symbol_bundle_sha256": "sha256:...",
  "dsse_envelope": "dsse:...",
  "rekor_tile_ref": "rekor:...",
  "sandbox_image_sha256": "sha256:...",
  "seed": 123456,
  "run_instructions": "deterministic-run.sh --seed $seed",
  "verifier_version": "v1.2.3"
}
```

---

## 3) Acceptance & auditor checks (automatable)

1. **Evidence integrity**

   * Verify DSSE (signature + subject)
   * Verify Rekor inclusion proof matches `rekor_tile_ref`
2. **Provenance join completeness**

   * ≥95% of top‑N frames resolve to symbol bundles and linked artifacts
3. **Reproducible replay**

   * Harness run achieves `replay_success_ratio ≥ 95%`
   * For “forensic” policy: bit‑identical final state
4. **Chain‑of‑custody**

   * Each join includes signer identity, timestamp, and `insertion_rekor_tile_ref`

---

## 4) Operational recommendations (Stella Ops‑ready)

* **Gate symbol intake**: require SLSA/in‑toto/DSSE attestation before accepting symbol bundles.
* **Persist replay contracts**: store the JSON above next to each trace (Postgres JSONB).
* **One‑click “Audit bundle” export**: deliver `{trace, symbol_bundles, DSSE envelopes, Rekor tile fragments, replay harness}` as a **content‑addressed** archive for offline/legal review.
* **Policies**: make “join completeness” and “replay ratio” first‑class pass/fail gates in EvidenceLocker.

---

## 5) Where this plugs into Stella Ops

* **EvidenceLocker**: stores DSSE, Rekor fragments, and replay manifests.
* **Attestor**: validates DSSE + Rekor, stamps chain‑of‑custody.
* **ReleaseOrchestrator**: enforces “no symbols without attestation”.
* **Doctor**: offers a “Reproduce this crash” action that pulls the harness and runs it in a pinned sandbox.
* **AdvisoryAI**: can surface “provenance gaps” and recommend remediation (e.g., missing dSYM, mismatched PDB Age).

---

## 6) Quick backlog (bite‑sized tasks)

* Tables: `frames`, `symbol_bundles`, `artifacts`, `provenance_evidence`, `replays` (JSONB).
* Ingestors: symbol bundle hasher; artifact provenance fetcher; Rekor proof cache.
* Verifiers: DSSE verify, Rekor inclusion verify, join‑completeness scorer, replay runner.
* UI: Trace view with “Audit bundle” download + policy badges (join %, replay %, signer).

If you want, I can draft the Postgres DDL + a tiny Go/TS service that:

1. ingests a trace,
2. resolves frames against symbols,
3. joins to artifacts via `sha256/build-id/PDB GUID+Age/dSYM UUID`,
4. verifies DSSE/Rekor,
5. emits the replay manifest and an exportable audit bundle.