fix(build): stop the declaration build from losing its own output

[omridevk]

Fixes a regression from #372 that is currently on main and breaks local builds and the packed-tgz e2e.

Mechanism

Every package builds with vite build && tsc -p tsconfig.build.json.

1. vite build empties dist/, deleting the .d.ts files tsc emitted on the previous run.
2. tsc then reads the .build.tsbuildinfo chore(build): make typecheck cacheable and incremental #372 introduced, sees an unchanged source graph, and correctly concludes it has already emitted — so it writes nothing. TypeScript never checks whether its outputs still exist on disk.

Every second build silently loses all declarations. No turbo cache is involved; it happens inside a single pnpm run build.

Consumers then fail with TS7016: Could not find a declaration file for module '@conciv/…', which is what broke ui-kit-terminal, ui-kit-chat, extension-terminal and embed, and why the packed-tgz Next.js e2e went red on main at 9397c6e0 (that test installs real packed artifacts).

Measured

@conciv/protocol, same sources, two consecutive builds, before the fix:

build 1 (no buildinfo):                      17 d.ts
build 2 (buildinfo present, sources same):    0 d.ts

After the fix, the whole @conciv/embed dependency chain built twice:

PASS1  protocol=17  ui-kit-system=30
PASS2  protocol=17  ui-kit-system=30

The change

Incremental state is only safe when a single tool owns the outDir. So it stays on for typecheck (tsc --noEmit, nothing else writes there — that is the caching #372 wanted, and it works) and comes off for the declaration build: 18 tsconfig.build.json files get "incremental": false and drop tsBuildInfoFile.

turbo.json is unchanged from main — an earlier revision of this PR added .build.tsbuildinfo to the build task's outputs, which only made cache restores consistent and did not fix the underlying loss. That is reverted.

Gates: format:check clean, typecheck green, fallow audit --changed-since main verdict pass.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Standardized TypeScript build settings across packages by disabling incremental compilation.
  • Removed custom build-info file configuration.
  • Preserved declaration-only output and existing source/output directory settings.

[coderabbitai]

📝 Walkthrough

Walkthrough

The package TypeScript build configurations now disable incremental compilation and remove explicit tsBuildInfoFile paths. Declaration-only output and existing source/output directory settings remain unchanged.

Changes

TypeScript build configuration

Layer / File(s)	Summary
Disable incremental builds packages/embed/tsconfig.build.json, packages/extensions/*/tsconfig.build.json, packages/protocol/tsconfig.build.json, packages/solid-diffs/tsconfig.build.json, packages/solid-streamdown/tsconfig.build.json, packages/ui-kit-*/tsconfig.build.json, packages/uno-preset/tsconfig.build.json	The build configurations remove tsBuildInfoFile and set incremental to false. Declaration-only emission and existing output settings remain configured.

Estimated code review effort: 1 (Trivial) | ~5 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title describes the main build fix: preserving declaration build outputs and preventing them from becoming inconsistent with cached build information.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/build-tsbuildinfo-outputs

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[Copilot]

Pull request overview

Fixes local incremental declaration builds by caching TypeScript build metadata alongside generated declarations.

Changes:

• Adds .build.tsbuildinfo files to Turbo’s build outputs.
• Ensures cached declarations and their incremental state are restored together.

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@packages/extensions/tanstack/tsconfig.build.json`:
- Around line 8-9: Remove the inherited tsBuildInfoFile setting from all nine
build configurations while retaining incremental: false and the existing dist/**
output: packages/extensions/tanstack/tsconfig.build.json (lines 8-9),
packages/extensions/terminal/tsconfig.build.json (lines 8-9),
packages/extensions/test-runner/tsconfig.build.json (lines 8-9),
packages/extensions/try-it/tsconfig.build.json (lines 8-9),
packages/extensions/whiteboard/tsconfig.build.json (lines 8-9),
packages/protocol/tsconfig.build.json (lines 9-10),
packages/solid-diffs/tsconfig.build.json (lines 8-9),
packages/solid-streamdown/tsconfig.build.json (lines 8-9), and
packages/ui-kit-chat-tools/tsconfig.build.json (lines 8-9).

🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 7654dcd1-d270-4c80-b59e-459ef5258bfb

📥 Commits

Reviewing files that changed from the base of the PR and between be268d1 and abf4b5a.

📒 Files selected for processing (18)

• packages/embed/tsconfig.build.json
• packages/extensions/ios/tsconfig.build.json
• packages/extensions/page/tsconfig.build.json
• packages/extensions/recorder/tsconfig.build.json
• packages/extensions/tanstack/tsconfig.build.json
• packages/extensions/terminal/tsconfig.build.json
• packages/extensions/test-runner/tsconfig.build.json
• packages/extensions/try-it/tsconfig.build.json
• packages/extensions/whiteboard/tsconfig.build.json
• packages/protocol/tsconfig.build.json
• packages/solid-diffs/tsconfig.build.json
• packages/solid-streamdown/tsconfig.build.json
• packages/ui-kit-chat-tools/tsconfig.build.json
• packages/ui-kit-chat/tsconfig.build.json
• packages/ui-kit-system/tsconfig.build.json
• packages/ui-kit-tap/tsconfig.build.json
• packages/ui-kit-terminal/tsconfig.build.json
• packages/uno-preset/tsconfig.build.json