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TacTile›Launch TacTile›NFC/QR Core Pipeline·36 in this wave

Approve: NFC/QR Core PipelineTo do · blocker Real scans are never recorded: nothing calls POST /api/events/openBlocked · blocker Verify end-to-end scan path for all 14 destination typesTo do Build the unassigned/orphaned tag landing pageDone Suppress analytics event writes for free-tier accountsDone Unify the four conflicting hash validation patternsDone Assess hash entropy against enumeration and PII scrapingDone Decide and implement Free-tier destination revitalizationDone Rate-limit and cache the public scan resolverTo do Triage the "couldn't connect to the server" preview clusterDone Android NdefUriDecoder accepts any host: anchor it to tactile.to / *.tactile.to or decide custom-domain tagsDone Public scan landing page polishTo do Replace the duplicate web hash-shape copies with one shared import once #658 or #681 landsTo do Android NdefMessageBuilder.build always writes the Text record; spec omits it when the hash is blankDone iOS Program NFC Tag read path rejects 7 and 8 character hashes; spec says accept 7-9Done ndef-format.md is stale: deleted symbols, wrong line cites, duplicate messageIsEmpty, no URI decode tableTo do CI gives no per-suite proof for the NDEF suites: iOS prints totals only, Android's newest main run was a Gradle cache hitTo do Fix tap_count hardcoded to 0 in NFC metadata endpointDone Add hash exhaustion alertingDone Run end-to-end NFC hardware soak testTo do Document NDEF record formatDone Confirm whitelabel.tactile.to DNS + routingDone Add hash-format validation on /t/[hash] scan landingDone Load-test QR/NFC scan resolution at scale (1M+ events)To do Decide: is missing camera QR scanning in iOS/Android intentional?To do Reconcile the three divergent hash generatorsDone Close the check-then-insert race on hash claimingDone Enforce chip compatibility in code, not just docsTo do Handle partially-written and orphaned physical tagsTo do Sign off: NDEF spec and the 111 encoding unit testsDone Free-tier inactivity: R2 media purge job (follow-up to t_9008dc76)To do API: make the visibility gate's fail-closed 404 carry a machine-readable reason, so /d /n /v /a and /t can say "unavailable" for a Supabase failureTo do API: validate the hash shape in the four /content handlers (documents, notes, videos, audio) like destinationsPublic.ts doesTo do Android NfcWriter has no post-write read-back verify (spec 4a step 5)Done NDEF parity corpus: iOS asserts 1 of 5 vectors and no https://www. vector exists; generator and Kotlin disagree on wwwTo do ndef-format.md section 5 contradicts itself on empty + read-only; NFCTagClassifier.classify and diagnose order them oppositelyTo do

Wave

NFC/QR Core Pipeline

The core of the product — encoding tags and resolving scans. Everything else is a surface on top of this.

TacTile › Launch TacTile › NFC/QR Core Pipeline

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Sign off: NDEF spec and the 111 encoding unit tests

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Unlocks 1Approve: NFC/QR Core Pipeline

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## The task

**Sign off: NDEF spec and the 111 encoding unit tests** · done

Where it sits: TacTile › Launch TacTile › NFC/QR Core Pipeline

## Unlocks 1

- Approve: NFC/QR Core Pipeline

## The brief on file

[2026-10-15 · Viv] DONE on draft PR #759 (https://github.com/TacTile-dev/TacTile/pull/759, commit c05709c4, unmerged): docs/audit/2026-10-ndef-signoff.md. 111 = every Swift NFC test (21+20+6+27+37); 16 are byte-level NDEF (TS 3, Swift 8, Kotlin 5). CI proof per suite: TS verify run 37535818335 (ndef-golden-fixtures 3, nfc-tools 13, 4690 passed); Swift ios run 37523097722 (TacTileConnectTests 539 executed, totals only); Kotlin android run 35897129705 (680 tests, 102 classes; newest main run was a cache hit). 8 divergences filed as Viv tasks: t_191475f3 t_5f9966fb t_4e229bdf t_6cc300ed t_0d601c49 t_4ee6054d t_9e672afd t_74a17efc. Gate: passing with known-red verify:secrets-rotation, exit 0. CI on #759: only the sanctioned Secrets rotation audit is red. Reviewers: acceptance CONFIRMED, safety CONFIRMED.

[2026-10-15 · Viv] BUILT, not pushed or closed. Commit 06cbbc7d docs/audit/2026-10-ndef-signoff.md. 111 = every Swift NFC test (21+20+6+27+37); only 16 tests are byte-level NDEF across iOS, Android, TS. All suites ran in CI (run ids in the doc); Android's newest main run was a Gradle cache hit. 8 divergences, filed: t_191475f3 t_5f9966fb t_4e229bdf t_6cc300ed t_0d601c49 t_4ee6054d t_9e672afd, CI evidence t_74a17efc; the stamp-test GET_VERSION one is already in #687. Done-when is met once the doc is accepted.

Viv — verify the NDEF work that is believed complete actually holds. Done when: the 111 unit tests are confirmed passing in CI (not just locally), docs/nfc/ndef-format.md is confirmed to match the shipping implementation rather than having drifted, and any divergence between spec and code is logged as a bug. WHY THIS IS SEPARATE FROM THE HARDWARE SOAK TEST: the tests prove the encoding logic in simulation, the soak test proves real chips and radios. Both are needed and neither substitutes for the other. Also relevant — a prior audit found the local pnpm verify includes a swift-parity check that CI never runs, so 'tests pass' locally is not evidence they pass in CI. Files: docs/nfc/ndef-format.md, and the NDEF test suite

## How to work this

- Do the work, don't just plan it. If the fix is obvious and safe, make it.
- Surface anything needing Matthew's sign-off instead of deciding it yourself.
- Short replies. Lead with the answer, then stop.
- Finish by saying what changed, what you verified, and what you'd do next.

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NFC/QR Core Pipeline

Sign off: NDEF spec and the 111 encoding unit tests