- Refactored and condensed numerous system prompts, agent instructions, and tool documentation files across packages.
- Streamlined workflow rules, formatting constraints, and execution guidelines for improved clarity and brevity.
- Updated discovery rules, recommendation criteria, and syntax standards in prompt templates.
- Implemented in-house, zero-dependency utility modules in `pi-utils` covering DOM manipulation, markdown parsing, templating, browser automation helpers, and terminal buffers.
- Migrated packages across the repository to consume the new internal utilities and `omptype` schema validators instead of external dependencies.
- Removed multiple external runtime and development dependencies including Zod, Marked, LRU cache, Turndown, and Puppeteer browser packages.
- Add the `ts-no-local-is-record` built-in rule to detect local `isRecord` definitions and direct agents to shared guards.
- Add unit tests validating detection of local function and lambda definitions for the new rule.
- Added `interruptMode: never` to all updated Go, Rust, and TypeScript built-in discovery rule files.
- Changed `ts-no-inline-cast-access.md` from `interruptMode: tool-only` to `interruptMode: never`.
- Added eight new Go-specific rules to the discovery package.
- Registered the new Go rules in the default rule source index.
- Covered the new Go AST matching conditions with test cases in `builtin-defaults.test.ts`.
- Replaced usage of `ReturnType<typeof setTimeout>` and `ReturnType<typeof setInterval>` with the explicit `Timer` type across the codebase.
- Updated several type definitions and function signatures to use concrete types instead of inferred return types for improved clarity and maintainability.
- Migrated all wire protocol, schema definitions, and tools validation from Zod to ArkType across multiple packages.
- Updated extension runtimes, custom tools loader, and TypeBox compatibility shim to expose and use ArkType instances.
- Added a comprehensive ArkType migration guide, validation parity tests, and helper utilities.
- Removed redundant PDF asset routing and parsing implementations from the read tool.
- Added a new builtin rule definition file, `ts-no-inline-cast-access.md`, with AST patterns that flag inline cast member access and usage guidance.
- Registered the new rule in `src/discovery/builtin-rules/index.ts` so it is included in the built-in TypeScript rule set.
- Updated `ts-no-any.md` to recommend schema parsing at trust boundaries and clarified when to choose schema parsing, guards, or unchecked casts.
- Added a new built-in TTSR rule `ts-no-test-timers.md` that flags `Bun.sleep`, `setTimeout`, and `setInterval` usage in `*.test.ts` files.
- Registered `ts-no-test-timers` in the built-in rules index so it ships with default discovery providers.
- Updated builtin-defaults tests to enforce rule-name uniqueness and verify the new rule only matches in `*.test.ts` scopes.
- Added astCondition to rule frontmatter parsing and rule metadata, with AST-grep normalization.
- Updated TTSR bucketing so astCondition-only rules are treated as interruptible matches.
- Added ts-redundant-clear-guard as a built-in JS/TS tool rule for guarded clear* calls.
- Added AST snapshot matching in agent sessions with per-stream cache throttling and cleanup.
- Converted compaction, branch, and handoff prompts to fragment voice.
- Replaced "You MUST" phrasing with bare "MUST" directives.
- Applied same rewrite to autoresearch and turn-aborted prompts.
- Warns against leaving `@deprecated` compatibility shims instead of finishing a refactor.
- Registered in the builtin rule index and covered by the defaults test.
- Added 14 bundled TTSR rules (TypeScript and Rust conventions) embedded into the binary via the lowest-priority `builtin-defaults` provider.
- Extracted rule bucketing into `bucketRules` with support for `disabledRules` and `builtinRules` settings.
- Added `ttsr.builtinRules` and `ttsr.disabledRules` settings to control which rules are active per session.
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