tapir/docs/sprints/audio-upload-followups-2026-10.md

Sprint: audio upload follow-ups (Sweep Sprint, 2026-10)

Method: Sweep Sprint (phase 1 parallel read-only research per issue: done; phase 2 sequential execution, one issue per commit: not started, waits for the owner's go). Closing oath below.

Milestones: v0.31.1 - security and robustness, v0.32.0 - audio upload follow-ups.

Context: v0.31.0 shipped audio upload (ADR-033/034/035) and is live in production behind auth at /uploads, with the Berget cloud fallback on for audio (infra#522). A real 63.7 min upload transcribed in 2m53s with no errors. The phase-1 investigation found two pre-existing or new weaknesses an authenticated user can reach, so the first release is a hotfix.

Oath (closing gates, every clause must hold; blocked = descoped and tracked, never "done")

#	Clause	Evidence
SG1	Every issue in the sprint is closed with a linked commit, or moved out with a stated reason	issue list of both milestones
SG2	Each fix has a test that was seen red on main first, named after the mechanism it observes	red/green output in the issue
SG3	task check AND golangci-lint run ./... exit 0 (checked by $?, not by grep); task check does not gate lint until #41	gate output
SG4	Control code (#48, #49, the upload cap in #47) has a recorded adversarial review verified by execution, verdict in the issue	gatekeeper verdict comment
SG5	Docs current in the same commit: ADR-033/035 text, feature file, use-case coverage test	diff
SG6	Each release tagged (v0.31.1, v0.32.0), pushed, deployed, and observed live (pod running the new image, no restart loop, a real upload still works)	kubectl/log + one upload
SG7	Learnings written to the brain; deferred work filed as issues; decisions that are the owner's recorded as DECISION NEEDED	brain ids + issue numbers

Work order

v0.31.1 (security and robustness; hotfix, do first)

1. #41 lint gate. task check swallows lint findings (|| echo). Make the gate fail on findings, fix what it surfaces. First, so every later gate means something. (Decision D1.)
2. #48 cross-origin POST protection. http.NewCrossOriginProtection() around Router(). Red: foreign-origin POST to /account/delete, /uploads, /uploads/{id}/chat is refused.
3. #49 ffprobe/ffmpeg limits. -max_streams 32 + narrower probe output; probe stdout cap; probe deadline. Three commits.
4. #47 concurrent-upload cap (remaining item). Bound the spool: reservation per accepted upload against the 6Gi emptyDir so concurrent uploads cannot evict the pod.
5. #50 SIGTERM interim. Handle SIGTERM; record the interrupted job at once; fix the false comment. Full drain recorded as a limitation. (Decision D2.)

Release v0.31.1: one adversarial review round over 2-5, then tag, push, observe.

v0.32.0 (follow-ups)

6. #52 label a cloud-served transcript in plain words; document the empty-transcript trigger.
7. #53 bound the LLM client's response body read.
8. #51 tracker: save timeout, then app-clock heartbeat.
9. #37 nav link to uploads and per-recording delete (queued/transcribing: refuse until it ends). (Decision D3.)
10. #36 chat default model after measurement. (Decision D4.)
11. #38 measurements (Berget length limit, large models on production iguana). (D5, D6.)
12. #46 remainder of the hardening list after the items above are split out.
13. #45 evaluate Berget as the reconciler: a question, not work. (D8.)

DECISION NEEDED (owner's call; recommendation first)

#	Question	Recommendation	Blocks
D1	#41: should any linter be allowed to opt out of the gate?	No opt-out; fix findings	#41
D2	#50: full SIGTERM drain, or record as a limitation and ship the interim fix?	Limitation + interim; a drain costs 4-6 h and downtime on every deploy at current volume	#50
D3	#37: delete of a queued/transcribing recording	Refuse until it ends	#37
D4	#36: make a 31B model the chat default?	Only after measurement, conditional	#36
D5	#38: Berget length measurement needs a throwaway key	Yes, throwaway key	#38
D6	#38: load large models on production iguana	Yes, in a quiet window with the owner present	#38
D7	#46: where the ffmpeg tarball lives	Do nothing now; file an issue	none
D8	#45: evaluate Berget as the reconciler	No; stay local-only	#45
D9	Who judges ADR-034's second blind check	The owner; do not reuse the one-off Opus authorisation	ADR-034
D10	When to enable reconcile in production	Needs iguana/pianissimo in the key pin and env vars; owner present	ADR-034

Dropped or reduced, with reasons

• #46 item 1 (alis/dref external reference): checked, not a problem. Under the application's flags ffmpeg skips the external track and writes a 78-byte WAV.
• #46 item 2 / #47 item 2: merged into #49.
• #47 item 3 (full drain): reduced to #50 plus a recorded limitation.
• #46 Beat taking the tracker mutex: incorrect in #46; only logStill does. Corrected in #51.

Human-present items (do not run unattended)

• Production iguana model loads (#38, D6).
• Enabling reconcile in production (D10).
• Any key change or apply in infra (infra#523, infra#524 are open and not part of this sprint).

Release plan

SemVer: v0.31.1 patch (fixes, no new behaviour); v0.32.0 minor (nav link, delete, cloud labelling). Every push to tapir main redeploys the pod and fails any job in flight: push when no upload is running (check the pod log first).