fix[notask]: expose binding.js via package exports on audiogen-ggml + tts-ggml for mobile bundler

[Alok-Ranjan23]

Summary

Two-line fix across packages/audiogen-ggml/package.json and packages/tts-ggml/package.json — adds "./binding.js": "./binding.js" to each addon's exports field so the mobile app bundler stops stripping binding.js from the shipped module. Aligns with the workaround pattern already used by @qvac/asr-ggml and @qvac/llm-llamacpp.

The bug (currently on main for audiogen; pre-empted for tts)

Mobile Android CI for @qvac/audiogen-ggml fails during addon construction on device:

[audiogen-mobile] load attempt 1/3 failed (MODULE_NOT_FOUND: Cannot find module './binding'
  imported from 'file:///app.bundle/node_modules/@qvac/audiogen-ggml/index.js'
Candidates:
- file:///app.bundle/node_modules/@qvac/audiogen-ggml/binding
- file:///app.bundle/node_modules/@qvac/audiogen-ggml/binding.js
- ... (12 candidates, none found)

Both testLoadModels and testGenerateMusicOnGpu fail within ~1 s. This happens in _createAddon() in index.js (~line 784) when it calls require('./binding').

@qvac/tts-ggml will hit the exact same failure the next time anyone runs its mobile CI — same code shape (require('./binding') in index.js), same missing ./binding.js in exports. It hasn't been mobile-tested since 2026-08-18 (before the bundler tightening on 2026-08-22), so the failure hasn't been observed empirically yet, but the diagnosis is identical.

Root cause

The mobile bundler (from tetherto/qvac-test-addon-mobile, called by integration-mobile-test-*-ggml.yml) recently tightened exports-field enforcement. Files not declared in exports are stripped from the on-device app.bundle. Neither audiogen-ggml nor tts-ggml had "./binding.js" in their exports — so binding.js gets excluded from the bundle, and require('./binding') in index.js has no file to resolve.

Evidence

Addon	"./binding.js" in exports?	Mobile addon load
@qvac/asr-ggml	✅	✅ addon loads on device (verified 2026-08-25 run 32841431292: 6 GPU-smoke test cases ran end-to-end with 4–60 s timings)
@qvac/llm-llamacpp	✅	(declares the same workaround)
@qvac/tts-ggml	❌ before this PR	(no recent mobile run; will fail next time it runs)
@qvac/audiogen-ggml	❌ before this PR	❌ fails on main — reproduced via workflow_dispatch runs 32967429767 and 32972232229, identical MODULE_NOT_FOUND signature

asr-ggml and llm-llamacpp already declare the same "./binding.js": "./binding.js" line — this PR aligns audiogen-ggml and tts-ggml with that pattern.

When it started failing

Last known-green audiogen mobile run: 2026-08-20 (SHA c7af7f156). Last known-green tts mobile run: 2026-08-18. Regression window includes the Node 22 + Appium 3 bump (dabf43fb2, 2026-08-22) which required matching updates in the external qvac-test-addon-mobile repo — the bundler tightening most likely rode along there. The addon source code did not need to change; the older lenient bundler was tolerating a missing exports declaration and the new one isn't.

Verification

• node -e "JSON.parse(...)" on both modified package.json files — valid JSON.
• prettier --check on both — no formatting drift.
• git diff — two literal one-line additions.
• No source code changed; binding.js content is unchanged in both addons; the addons behave identically at runtime.

The audiogen fix will be empirically re-validated by re-dispatching integration-mobile-test-audiogen-ggml.yml against main once merged. The tts fix will be validated when someone next runs integration-mobile-test-tts-ggml.yml.

What this unblocks

• Any mobile CI validation of @qvac/audiogen-ggml (functional smoke, RTF benchmark), which has been red on main since ~2026-08-22.
• The next mobile CI run of @qvac/tts-ggml, which would otherwise hit the same failure.
• Empirical wall-time validation of QVAC-24086 / PR #4084, which is coverage-preserving-only and passed all non-mobile CI but couldn't be validated on device against this pre-existing regression.

What this does NOT change

• No source code (JS, TS, C++).
• No CI workflow, no mobile action, no benchmark path.
• No version bump — this is a build-time export declaration, not a shipped-behavior change; the runtime is byte-identical for both packages.

[github-actions]

Review Status

Current Status: ✅ APPROVED
Approvals so far: Team Lead: 1, Member: 1

[github-actions]

License compliance — clean

No new dependency license findings in this PR.

Warn-only (shadow) mode — this check does not block merges yet.

Updated automatically by the canonical license compliance workflow.

NOTICE presence (advisory)

Missing NOTICE (advisory, does not block):

• ./.github/actions/release-merge-guard
• ./docs/website
• ./packages/ggml-coload-smoke
• ./packages/fabric/test/integration
• ./packages/inference-addon-cpp/mobile
• ./packages/sdk/e2e
• ./packages/llm-llamacpp/benchmarks/performance
• ./packages/llm-llamacpp/benchmarks/server
• ./packages/vla-ggml/sim/server
• ./packages/embed-llamacpp/benchmarks/performance
• ./packages/embed-llamacpp/benchmarks/server
• ./packages/asr-ggml/benchmarks/server