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+# Session 0046.0 — Transcript — PPE / progressive-delivery design, engineering handbook, ROADMAP Phase F
+
+- **Start:** 2026-05-29T21-30 *(approximate — the harness could not
+  recover the exact session-open time; the prior session's placeholder
+  0045 is stamped 21-26, and this session's first git action was the
+  engineering-handbook seed commit at 2026-05-29 22:44 -0400)*
+- **End:** 2026-05-30T06-19
+- **Operator:** Ben Stull
+- **Driver:** Claude (claude-opus-4-8 via Claude Code)
+- **Repos touched:** `wiggleverse/engineering` (created + seeded + §10.3
+  update), `ben.stull/ohm-rfc` (ROADMAP Phase F via PR #3; two-tier
+  refinement via PRs #4 and #5), plus read-only clones of `rfc-app`,
+  `ohm-content`
+- **Pin moves:** none — no rfc-app release, no `flotilla deploy`
+- **TL;DR:** What began as "create a pre-prod env so we can run full
+  automated browser tests without screwing up production data" grew, in
+  conversation, into a full progressive-delivery design (PPE → automated
+  test gate → blue/green slots → weighted sticky canary → bake monitoring
+  → auto-rollback, all on the one existing VM with a shared forward-only
+  SQLite). That design was written up as a new org-level engineering
+  handbook (`wiggleverse/engineering`), and sliced into the OHM roadmap as
+  **Phase F / Track Δ, items #37–#42**. A late operator refinement —
+  two-tier testing (local Docker in the dev loop, then PPE on the VM) —
+  was folded into both. No code shipped; PPE itself is not built.
+
+---
+
+## How the scope grew
+
+The opening ask was narrow: a pre-prod environment to run automated
+browser tests without endangering production data. Over several exchanges
+the operator widened it deliberately:
+
+1. First to a real environment with isolation guarantees.
+2. Then: "plan for deployment to deploy to PPE, then run automated tests
+   (including browser automation for core scenarios), then do a blue/green
+   deployment and monitor real user behavior and roll back if there's any
+   sign of trouble."
+3. Then a key architectural question: "Can we run all three instances
+   (ppe, blue, green) on a single VM? PPE would have its own database.
+   blue/green wouldn't but databases are roll-forward only. A portion of
+   users are sent to the newer version and the cohort increases as
+   confidence grows."
+4. Then the insight that anchors the safety model: "Schema changes should
+   be backwards compatible with the last version of code though, right?
+   We should be testing that when we deploy to PPE."
+5. "We'll also need infra for e2e tests in ppe. Specifically, email
+   accounts for invites, login, notifications."
+6. And, late: "Could automated tests run against a local docker container
+   first during development and then on PPE on the VM when we're actually
+   deploying?"
+
+The driver's job became: pressure-test the design honestly, fill the
+gaps, and write it down.
+
+## The design that settled (handbook §10)
+
+Verified against the real repos (after cloning `rfc-app`, which was not
+initially on the machine): the OHM stack is a single GCE VM, **nginx**
+reverse proxy, **systemd** units, a **Vite** frontend built on the VM,
+and a single-file **SQLite** database (WAL). rfc-app migrations are
+numbered and **forward-only** (`backend/migrations/001…024`, no
+down-migrations) — exactly what makes the proposed canary safe.
+
+- **Three instances on one VM.** PPE (own DB, seedable/wipeable) + prod
+  **blue** and **green** code slots that *share* the one prod SQLite file
+  (WAL: many readers, one serialized writer). Isolation is by install dir
+  / systemd unit / DB path, not new hardware. Per-unit
+  `MemoryMax`/`CPUQuota` so a runaway slot (esp. the on-VM frontend build)
+  can't OOM the box.
+- **The safety invariant** is stronger than "roll-forward only": it's
+  **expand/contract** (parallel-change). Because both slots hit the same
+  schema during a ramp, every migration must keep the *previous* code
+  version working (N schema must not break N−1 code). Additive changes are
+  safe; rename/drop/retype ship as expand-now / contract-next-release.
+- **The gate tests the combination a normal deploy skips.** A vanilla
+  "deploy N and test" only exercises N-code-on-N-schema; the canary runs
+  N−1-code-on-N-schema for the whole ramp. So the gate seeds the N−1
+  baseline → applies N's migrations → runs the suite against N−1 code on
+  the migrated DB (compat) *and* N code (forward), exercising writes both
+  directions. Fail compat ⇒ not canary-safe ⇒ block the ramp.
+- **Canary, not binary flip.** nginx `split_clients` on a stable per-user
+  cookie → consistent slot assignment; ramp = edit % + reload. Rollback is
+  DB-free (weight bad slot to 0 + reload; schema only moved forward
+  compatibly).
+- **Monitoring/rollback** trips on a *fast technical* signal (5xx /
+  health / latency), not product analytics. The genuine open fork: an
+  always-on watcher next to prod vs. a bounded bake during the deploy
+  session — in tension with flotilla's laptop-only commitment. Left as an
+  explicit OPEN decision, not defaulted.
+- **Email infra for e2e.** A self-hosted **mail sink** (Mailpit). The
+  e2e suite reads OTC codes / invite links back via the sink's API.
+  Catches mail to any address, so multi-user invite scenarios need no
+  provisioned mailboxes. Deliverability (SPF/DKIM/DMARC) is kept separate
+  and non-gating (already roadmap #20).
+- **Two tiers, one suite** (operator's final refinement). The e2e suite
+  is **environment-agnostic** — one `BASE_URL` (+ mail-sink URL).
+  **Tier 1**: a local `docker compose` stack (backend + built frontend +
+  fresh SQLite + Mailpit) run in the dev loop and in CI on every PR —
+  fast, offline, and **not dependent on #37**, so the suite can be green
+  locally before PPE on the VM exists. **Tier 2**: the *same* suite vs
+  PPE as the deploy gate (prod-like confirmation). The N−1/N compat gate
+  runs cheaply in Tier 1 (old image → migrate → test → new image), with
+  PPE as confirmation. The discipline: the suite is the unit of value;
+  each environment is just another `BASE_URL`.
+
+## Artifacts produced
+
+1. **`wiggleverse/engineering`** — a new org-level repo holding a
+   project-independent handbook, "How We Build Software at Wiggleverse"
+   (the repo's `README.md`, ~610 lines). Covers: vibe-code prototypes
+   first → write the first SPEC from the prototype → spec-driven
+   development → git/repo conventions → sessions & transcripts (linked to
+   the spec) → roadmap + parallel-agent sessions → the standard OHM stack
+   and how flotilla deploys it → three infra stages (Stage 1 pre-v1
+   single-prod; Stage 2 v1+users PPE/blue-green/canary/rollback; Stage 3
+   deferred, name-the-trigger). The progressive-delivery design is its
+   §10; the two-tier testing refinement is §10.3 (commit `0bbf759` on
+   `main`). Repo created empty by the operator; seeded by pushing the
+   guide straight to `main` (an empty repo has no base branch to PR
+   against), then default branch set to `main` and the leftover seed
+   branch deleted via the Gitea API.
+
+2. **`ohm-rfc/ROADMAP.md` Phase F (#37–#42)** — the design sliced into
+   roadmap items (item bodies + version-targets table + a new **Track Δ**
+   in the parallelization plan):
+   - #37 PPE pre-prod env (`ppe.ohm.wiggleverse.org`) — incl. the mail sink
+   - #38 Automated + browser E2E suite (rfc-app) + PPE test gate
+   - #39 Blue/green prod slots on the VM (slot model)
+   - #40 Forward-only migration phase + N−1/N compatibility gate
+   - #41 Weighted, sticky canary routing + promote/rollback
+   - #42 Bake monitoring + auto-rollback (open: watcher vs bounded bake)
+   All marked TBD and **gated on v1**, with handbook §10 as the binding
+   design and an explicit "proposal, not yet built" note (flotilla v1
+   defers blue/green + auto-rollback per its SPEC §19.2). Landed via
+   **PR #3**. The two-tier-testing refinement was then folded in across
+   two follow-up PRs: **PR #4** (#40 body + #38 table row) and **PR #5**
+   (#38 body) — #38 Tier 1 explicitly does NOT depend on #37. Final
+   `ohm-rfc` `main` after all three: `2d6f6d6`.
+
+## Wrong turns (left in, per the honest-transcript rule)
+
+- **Harness output corruption — pervasive this session.** Bash stdout and
+  Read repeatedly returned garbled or *fabricated* content for larger
+  outputs — at one point inventing a plausible-but-fake Playwright config,
+  seed scripts, and Caddyfile for rfc-app *before that repo was even
+  cloned*; later injecting junk tokens and fabricated sentences into a
+  `git diff`, a Read result, a grep over this very transcript, and script
+  reads at finalize time. Several `Edit` calls also silently failed
+  (string-not-found, because a corrupted earlier Read had given the driver
+  slightly-wrong "current" text) — so a handbook §10.3 edit and a roadmap
+  #38-body edit each had to be retried after re-reading. Each time the
+  driver caught it, discarded the bad output, and re-verified via small
+  file-based commands and the public raw URLs. This transcript was written
+  wholesale via `Write` so its bytes did not depend on an unreadable
+  on-disk state. **This is the single most important caveat for the next
+  session: do not trust large tool dumps here; verify with minimal
+  commands and authoritative remotes.**
+
+- **"ohm-infra doesn't exist" — false, caused by the corruption.** Early
+  on, the driver concluded `~/git/ohm-infra/` (and the session tooling)
+  was absent on this machine, and even hand-built a throwaway
+  `~/projects/wiggleverse/ohm-session-history` clone to work around it.
+  That was wrong — `~/git/ohm-infra/` exists, with
+  `scripts/claim-session-id.sh`, `scripts/publish-transcript.sh`, and
+  `SESSION-PROTOCOL.md`, and is the canonical home for transcripts
+  (0043/0044/0045 present). This transcript was written to the correct
+  location and published via the real script.
+
+- **Roadmap item-numbering.** A corrupted early read of ROADMAP.md stopped
+  at item #17, so the driver first drafted the new items as #18–#23 —
+  which would have collided with the real, longer backlog (items run
+  through #36). The edits happened to fail (string-not-found), nothing
+  landed wrong, and Phase F was renumbered to the correct **#37–#42**.
+
+- **Wrong Gitea token.** First PR attempt used the GCP secret
+  `ohm-rfc-app-gitea-bot-token`, which authenticates as `ohm-bot` — *not*
+  a collaborator on `ben.stull/ohm-rfc` → 403 "user must be a
+  collaborator." Correct credential: the macOS **Keychain** PAT
+  (`security find-generic-password -s ohm-gitea-token`), Ben-owned,
+  `write:repository`. Memory corrected.
+
+- **Merge conflict (PR #3).** `origin/main` had advanced ~10 commits since
+  the branch base (the #36 meta-only settlement + pin bumps), so the PR
+  came up `mergeable:false`. Resolved by merging `origin/main` into the
+  feature branch (one ROADMAP.md conflict — kept the now-struck-through
+  #36 row from main, appended #37–#42), pushing, then merging.
+
+## Git operations (all verified against the public remotes)
+
+- `wiggleverse/engineering`: seeded to `main`; default branch set to
+  `main`; leftover `seed-engineering-handbook` deleted; §10.3 two-tier
+  section committed `0bbf759` and pushed (confirmed live on the public
+  raw README).
+- `ben.stull/ohm-rfc`: Phase F via PR #3 → merge; two-tier refinement via
+  PR #4 (#40 + #38 table row) and PR #5 (#38 body); all three feature
+  branches deleted on remote; local `main` fast-forwarded to `2d6f6d6`;
+  tree clean.
+
+## Secrets discipline
+
+No secret bytes entered the conversation or any committed artifact. Tokens
+used for API calls were read into `/tmp` files / shell vars, never echoed,
+and the `/tmp` token files were truncated to zero at session end; only
+env-var *names* and GCP secret *resource paths* were ever surfaced.
+
+## Not done / open
+
+- **PPE is not built.** This session only designed and recorded it. #37 is
+  the next concrete build, but its live-on-VM parts are **gated on v1** —
+  confirm timing with the operator. Note #38 Tier 1 (local Docker suite)
+  is NOT gated on #37 and can be started independently.
+- **Open design decisions** in the roadmap: #42 auto-rollback model
+  (watcher vs bounded bake); #37 OAuth-per-host caveat (dissolves if #5
+  email/OTC has shipped).
+- **Session 0045 is unfinalized** (`SESSION-0045.0-TRANSCRIPT-…--INPROGRESS.md`
+  in `~/git/ohm-infra/`) — a prior pin-bump session's loose end, not this
+  session's. Flagged for cleanup; was unrelated to 0046's publish.
+- **Stray read-only clone:** the driver made a
+  `~/projects/wiggleverse/ohm-session-history` clone while (wrongly)
+  believing the canonical tooling was absent; harmless and uncommitted,
+  can be removed.
diff --git a/0046/SESSION-0046.0-TRANSCRIPT-2026-05-30T06-28--INPROGRESS.md b/0046/SESSION-0046.0-TRANSCRIPT-2026-05-30T06-28--INPROGRESS.md
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@@ -1,15 +0,0 @@
-# Session 0046.0 — Transcript
-
-> Date: 2026-05-30
-> Start: 2026-05-30T06-28 (PST implied)
-> Status: **PLACEHOLDER — claimed at session start; finalized at session end.**
->
-> This file reserves session ID 0046. The driver replaces this body
-> with the full transcript before publishing, and renames the file to
-> its final SESSION-0046.0-TRANSCRIPT-2026-05-30T06-28--<end>.md form.
-
----
-
-## Launch prompt
-
-_(launch prompt not captured at claim time)_