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# Session 0049.0 — Transcript
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> Date: 2026-05-31
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> Goal: Build **Patchwatch Phase 1** — the read-only `flotilla audit` radar
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> (ohm-rfc ROADMAP #43), per `PATCHWATCH-PHASE1-RADAR.md`. No Track Δ
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> dependency; ships value alone. Do NOT build the auto-initiate tier.
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>
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> Outcome: **flotilla v1.5.0 built, tested (271/271 green), committed, and
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> pushed** to branch `session-0049/patchwatch-phase1-audit`. `flotilla audit
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> <deployment>` scans four layers (py-app, node-app, os, flotilla) via
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> osv-scanner + CISA KEV, classifies each finding into fast/routine/mitigation
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> lanes, and reports — read-only. SPEC §12.4/§13.10 + CHANGELOG + operator-guide
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> synced. PR not yet opened (auth); the two design-doc branches remain unmerged.
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---
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## Pre-session state
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- Picked up after session 0048, which designed Patchwatch and wrote it up as
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ohm-rfc ROADMAP #43 + `PATCHWATCH-PROPOSAL.md` + `PATCHWATCH-PHASE1-RADAR.md`.
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No code/deploy/pin change happened in 0048.
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- flotilla `main` at `5f1689f` (v1.4.0, gcloud config guard).
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- **Merge state checked at session start (both still unmerged):**
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- flotilla `patchwatch/proposal-docs` = `3df1c39`, 1 commit ahead of `main`.
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- ohm-rfc `roadmap/43-patchwatch` = `1bb3f39`, 1 commit ahead of `main`.
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- Locked design decisions (from 0048): osv-scanner backbone + CISA KEV;
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fast-lane threshold HIGH; mitigation = overlay kill-switch + edge-block
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fallback; tiered autonomy (critical+KEV auto-initiate, rest alert) — the last
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is a LATER phase, not this one.
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---
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## Plan (what this session set out to do)
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1. Claim session ID; confirm PR merge state.
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2. Build Phase 1 `flotilla audit` to `PATCHWATCH-PHASE1-RADAR.md`:
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finding schema, classifier (tunable threshold), CISA KEV, four scanners.
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3. Tests, all mocked; full suite green.
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4. SPEC / CHANGELOG / VERSION / operator-guide doc-sync.
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5. Commit, push, PR; transcript + handoff.
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---
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## Turn-by-turn arc
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### Arc 1 — Orientation + a double session-ID claim
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Read the Phase 1 doc, the proposal, and the session protocol. Ran
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`claim-session-id.sh` and — through a tool-batching mistake (a sandboxed call
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that was assumed to have failed had actually succeeded) — **claimed 0049 AND
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0050**. Kept **0049** as the real session and immediately finalized **0050** as
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an aborted stub (start == end), published via `publish-transcript.sh`, so the
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shared registry shows no phantom live session for 0050.
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Confirmed neither design PR was merged (see pre-state).
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### Arc 2 — Codebase survey + design decision
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Surveyed the flotilla codebase (Click CLI; `registry.py` deployment record;
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`pin.py` Gitea raw read; `ssh.py` IAP-SSH with the §11.6 gcloud guard;
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`webhooks.py`/`gitea.py` as the closest precedent for a read-only "inspect +
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report drift" verb; `deploy.py` for conventions).
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Key decision: the deployment record had **no field naming the rfc-app *source*
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repo** — it only knew the content/pin repo (`ben/ohm-rfc`). The Phase 1 spec
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(§2.1/§2.2) reads `requirements.txt`/`package-lock.json` from the rfc-app repo
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at the pinned tag via Gitea raw. Per the two-layer rule (CLAUDE.md), that
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coordinate must live in the record, not be hardcoded. So added a nullable
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`app_source_repo` column (migration 007), mirroring how 006 added
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`gcloud_config` — inert-until-set, host reused from `pin_source_host`.
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### Arc 3 — The build
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Worked in an isolated git worktree (memory: parallel sessions do hands-on git
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in a worktree; there were stale in-progress sessions in the shared repo).
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EnterWorktree branched off `origin/main` → branch
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`worktree-session-0049-patchwatch-phase1`.
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Shipped:
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- `ohm_rfc_app_flotilla/audit.py` (~760 lines): `Finding`/`ScannerError`/
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`AuditReport` schema (§3); `classify()` lane router with tunable
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`FAST_LANE_SEVERITY="high"` (§4); `normalize_severity` (GHSA words + CVSS
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numbers → 4 bands); `fetch_kev` (CISA KEV → set of CVE IDs); `osv_results_to_findings`
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(+ KEV join on aliases); `run_osv_scanner` (subprocess, exit 1 = vulns found,
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not error); Gitea raw read at a ref; four scanners (`scan_py_app`,
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`scan_node_app`, `scan_os`, `scan_flotilla`) each degrading to a
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`scanner_error` rather than crashing; `run_audit` orchestrator with all IO
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dependency-injected.
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- `migrations/007_app_source_repo.sql` + `registry.py` field plumbing +
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`cli.py` `deployment add/update/show --app-source-repo`.
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- `cli.py` `flotilla audit` verb: `--json`, `--layer`, `--min-severity`,
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`--fail-on` (default advisory/exit 0, like `pin check`/`webhook check`).
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- `tests/test_audit.py`: classifier truth-table, severity normalization, OSV→
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Finding + KEV join, apt parsing, every scanner (happy + degraded), `run_audit`
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orchestration, and CLI (`--json`/`--fail-on`/`--min-severity`/`--layer` +
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exit codes). All network/SSH/subprocess/clock mocked.
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### Arc 4 — A long fight with delayed tool output
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For a large stretch the harness rendered tool results in **severely delayed
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batches** (calls returned empty for many turns, then a big flush dumped
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everything at once). This cost a lot of turns: re-issuing reads, re-running
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pytest, and confirming the worktree path. One concrete casualty — an early
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batch was **cancelled** when a `git reset --hard origin/main` hit a permission
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denial and cascaded (so a first round of writes/edits had to be redone). The
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worktree was already at `origin/main`, so the reset was unnecessary anyway.
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Eventually learned that launching a background task (its completion
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notification) reliably flushed the backlog. No work was lost; the record keeps
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the friction in per the no-curation rule.
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### Arc 5 — Verification, doc-sync, push
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First green run: **270 passed, 1 failed** — and the failure was a bug in the
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*test*, not the code (`test_run_audit_pin_failure_degrades` asserted an OS
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*finding* existed, but the shared stub's fake VM reports nothing upgradable, so
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the OS scanner correctly returned zero findings). Fixed the assertion to "OS/
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flotilla scanned without error" → **271 passed**. `flotilla audit --help`
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renders correctly.
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Committed `b2a9a11` (code + CHANGELOG + VERSION 1.5.0 + pyproject), pushed to
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`session-0049/patchwatch-phase1-audit`. Then synced the binding docs (SPEC
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§12.1 line, §12.4 audit section, §13.10 record field; operator-guide §2.6 + §4;
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fixed the code/CHANGELOG cross-refs §12.2 → §12.4) in a second commit and
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pushed.
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---
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## Cut state (end of session)
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| --- | --- |
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| flotilla branch | `session-0049/patchwatch-phase1-audit` pushed to origin (off `main` `5f1689f`) |
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| flotilla `main` | unchanged at `5f1689f` (v1.4.0) — not merged this session |
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| VERSION | 1.5.0 (on the branch) |
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| tests | 271 passed |
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| OHM live | untouched (no deploy; v1.5.0 is operator-tool code, no redeploy needed) |
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| ohm-rfc pin | untouched |
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| design branches | flotilla `patchwatch/proposal-docs` + ohm-rfc `roadmap/43-patchwatch` — STILL UNMERGED |
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| Item | Status |
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| --- | --- |
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| Patchwatch Phase 1 radar (`flotilla audit`, ROADMAP #43) | ✅ built, tested, pushed (PR not yet opened) |
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| Patchwatch Phase 2 (OS unattended-upgrades) | ⏸ not started (independent of Track Δ) |
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| Patchwatch Phase 3 (mitigation lane / kill-switch) | ⏸ needs rfc-app coordination |
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| Patchwatch Phase 5 (auto-initiate tier) | ⏸ deliberately not built — needs Track Δ + cloud identity |
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---
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## §19.2 / follow-up candidates surfaced
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1. **Private rfc-app repo token.** The app scanners read the rfc-app source via
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public Gitea raw (like `pin.py`). If that repo is private, this needs the
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§19.2 "private-corpus token" — until then a private repo yields a
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`scanner_error`.
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2. **`app_source_host`.** Reused `pin_source_host` for the rfc-app source host.
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Split into its own field if a deployment ever hosts source elsewhere.
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3. **Richer OS severity.** `apt list --upgradable` has no per-package CVE/CVSS,
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so OS findings are severity `unknown` → routine. debsecan / osv-scanner
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Debian would let OS findings KEV-join and band properly.
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4. **CVSS-vector scoring.** `normalize_severity` prefers explicit severity
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words/numbers; it does not compute a base score from a raw CVSS vector
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(returns `unknown`). Most GHSA-backed OSV entries carry a word, so this is
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rarely hit, but a compact CVSS-v3 scorer would close the gap.
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5. **The cloud runner (Patchwatch §6).** Phase 1's verb is laptop-runnable and
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cloud-invokable unchanged; the Cloud Scheduler → Cloud Run read-only job that
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runs it every 4–6h and alerts on fast/mitigation is the next Patchwatch
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deliverable after the radar.
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---
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## What lands on the operator's plate
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1. **Merge the two design-doc PRs** (or tell the assistant to): flotilla
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`patchwatch/proposal-docs` and ohm-rfc `roadmap/43-patchwatch`. They were
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still unmerged at session start and this session did not touch them.
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2. **Open / merge the Phase 1 PR.** The branch
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`session-0049/patchwatch-phase1-audit` is pushed; the create-PR URL is
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`https://git.wiggleverse.org/wiggleverse/ohm-rfc-app-flotilla/pulls/new/session-0049/patchwatch-phase1-audit`.
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(The assistant could not open it itself — no confirmed Gitea PR-create auth
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for this repo.) v1.5.0 is operator-tool code; no OHM redeploy is required.
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3. **To actually run the radar against OHM later:** set
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`flotilla deployment update ohm-rfc-app --app-source-repo ben.stull/rfc-app`
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and install `osv-scanner` on the machine/runner that runs the audit.
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---
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## Prompt the operator can paste into the next Claude Code session
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```
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You are picking up after session 0049, which BUILT Patchwatch Phase 1 — the
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read-only `flotilla audit` radar (flotilla v1.5.0) — on branch
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`session-0049/patchwatch-phase1-audit` (off main 5f1689f). 271 tests green;
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pushed; PR not yet opened. Reserve your own session ID via claim-session-id.sh.
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State to confirm first:
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- Did the operator merge (a) the Phase 1 branch `session-0049/patchwatch-phase1-audit`
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into flotilla main, (b) the still-unmerged design branches flotilla
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`patchwatch/proposal-docs` and ohm-rfc `roadmap/43-patchwatch`? If not and
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you're asked to, drive the merges.
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- v1.5.0 added `flotilla audit <dep>` (four scanners → classifier → lanes,
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read-only) and an `app_source_repo` deployment-record field (migration 007,
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SPEC §13.10). osv-scanner is a PATH subprocess, not a pip dep.
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Good next moves (pick per the operator):
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1. Land/merge v1.5.0, then validate the classifier on REAL findings: set
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`flotilla deployment update ohm-rfc-app --app-source-repo ben.stull/rfc-app`,
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install osv-scanner, run `CLOUDSDK_ACTIVE_CONFIG_NAME=wiggleverse flotilla
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audit ohm-rfc-app` and eyeball the lanes. (Keep live-vuln detail out of the
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public transcript — reference by ID/category.)
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2. Patchwatch Phase 2: OS unattended-upgrades (security pocket) on the VM +
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reboot-required handling. Independent of Track Δ.
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3. The Patchwatch cloud runner (proposal §6): Cloud Scheduler → read-only Cloud
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Run job invoking `flotilla audit … --json` every 4–6h with alerting.
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Do NOT build the auto-initiate tier (Patchwatch Phase 5) — it depends on Track Δ
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(#37–#42) existing first.
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```
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# Session 0049.0 — Transcript
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> Date: 2026-05-31
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> Start: 2026-05-31T12-00 (PST implied)
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> Status: **PLACEHOLDER — claimed at session start; finalized at session end.**
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>
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> This file reserves session ID 0049. The driver replaces this body
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> with the full transcript before publishing, and renames the file to
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> its final SESSION-0049.0-TRANSCRIPT-2026-05-31T12-00--<end>.md form.
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---
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## Launch prompt
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_(launch prompt not captured at claim time)_
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