(janitor/dead-code): remove unused code-review platform prompt helpers

[kilo-code-bot]

What was deleted

Removed four exported symbols from apps/web/src/lib/code-reviews/prompts/platform-helpers.ts:

• getCliTool(platform) — returned the platform CLI name (gh/glab/bb)
• getPrTerm(platform) — returned the PR/MR term (PR/MR)
• replacePlatformPlaceholders(text, platform, values) — replaced {CLI}, {PR_TERM}, {REPO}, {PR_NUMBER}, etc. placeholders
• PLATFORM_TERMINOLOGY — platform terminology map

102 lines removed. getPlatformConfig, the PlatformConfig type, and the three per-platform config objects are retained because they remain reachable and in use.

Evidence of unreachability

• Repository-wide, case-insensitive searches for each symbol name across all file types (.ts, .tsx, .md, .json, tests, .specs, CI workflows) return only their own definitions.
• The file is imported from exactly one place: generate-prompt.ts, which imports only getPlatformConfig.
• No barrel/export * re-exports the file or these symbols (no prompts index re-export exists).
• No dynamic import()/require() of the file path exists.
• The external consumer repo Kilo-Org/kilocode contains no reference to these symbols (this is internal apps/web code, not a published package, so no external contract is involved).

Entry points checked

• Next.js conventions: the file is a shared lib module, not a route/page/layout/middleware; not discoverable by file-system convention.
• Tests: no test imports or jest.mock/requireActual these symbols; the only platform-helpers.test.ts belongs to a different file (src/lib/bot/platform-helpers.ts).
• Prompt templates: default-prompt-template*.json use {PR_NUMBER}/{MR_IID}/{BASE_SHA}/{HEAD_SHA} placeholders handled inline in generate-prompt.ts/prepare-review-payload.ts; they do not use the {CLI}/{PR_TERM} placeholders this helper existed to substitute.
• Config/CI/scripts: no references in knip config, tsconfig paths, jest config, or GitHub workflows.
• Cloudflare/Wrangler: N/A — apps/web is a Vercel Next.js app with no Wrangler bindings or Durable Objects involved.

Contract and compatibility

• Internal, unpublished apps/web code; no package exports, SDK, CLI, or plugin surface affected.
• No import-time side effects removed (pure functions and a const object).
• No persisted data, migrations, or compatibility shims involved.

Validation

• tsgo --noEmit -p apps/web/tsconfig.json — passes (exit 0).
• oxlint --config .oxlintrc.json on the file — 0 warnings, 0 errors.
• oxfmt --check on the file — clean; git diff --check clean.
• apps/web prompt unit tests (jest src/lib/code-reviews/prompts) could not run in this environment because their shared setup requires a live PostgreSQL instance (not available here), which is expected and unrelated to this change.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 files)

• apps/web/src/lib/code-reviews/prompts/platform-helpers.ts

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_{Reviewed by grok-4.6 · Input: 82.7K · Output: 3.5K · Cached: 123.9K}

_{Review guidance: REVIEW.md from base branch main}