- Changed hashline format separator from two spaces to pipe character (|) throughout codebase for consistency.
- Simplified ollama installation checks in test files by replacing execSync with Bun.which() and inverting PI_NO_LOCAL_LLM to PI_LOCAL_LLM environment variable.
- Added early return guards in test beforeAll hooks to skip tests when required tools (ollama, magick) are unavailable.
- Added debug instrumentation to system prompt building via PI_DEBUG_STARTUP environment variable for startup performance monitoring.
- Removed prompt cache retention assertion from openai-codex streaming test.
- Changed hashline display format separator from pipe to two spaces for improved readability.
- Removed `lines` and `hashes` parameters from read tool in favor of automatic file display mode resolution.
- Added `resolveFileDisplayMode` utility to centralize file display mode configuration logic.
- Integrated file display mode settings into grep and read tools for consistent output formatting.
- Consolidated tool parameter types to use schema-derived types via Typebox `Static` utility.
- Updated parseLineRef to handle both legacy pipe-separator and new two-space hashline formats.
- Added new `replace` hashline edit operation for substring-style fuzzy text replacement without line references, with optional `all` flag for replace-all behavior.
- Added `noopEdits` array to `applyHashlineEdits` return value to report edits that produced no changes, including edit index, location, and current content for diagnostics.
- Added validation to detect and reject hashline edits using wrong-format fields (`old_text`/`new_text` from replace mode, `diff` from patch mode) with helpful error messages.
- Renamed hashline edit operation keys from `single`/`range`/`insertAfter` to `set_line`/`replace_lines`/`insert_after` for clearer semantics.
- Enhanced error messages for wrong-format hashline edits to guide users toward correct operation syntax.
- Migrated all environment variable access from Node.js `process.env` to Bun runtime `Bun.env` API across the entire codebase.
- Updated 71 files including source code, tests, documentation, and configuration to use Bun's native environment variable API.
- Added comprehensive environment variables documentation in `packages/coding-agent/docs/environment-variables.md` covering 100+ environment variables organized by category.
- Updated CHANGELOG entries to reflect migration from `process.env` to `Bun.env` and environment variable prefix changes (PI_* vs OMP_*).
- Maintained identical behavior and logic across all changes - only the environment variable access method was updated.
- Replaced nanoid and randomUUID with Snowflake ID generator across codebase for consistent distributed ID generation.
- Created new Snowflake utility module in packages/utils with support for 64-bit distributed ID generation with configurable epoch, machine ID, and sequence numbers.
- Updated session ID format documentation from nanoid to snowflake hex string format (16 hex characters).
- Removed nanoid dependency from package.json as it is now replaced by internal Snowflake implementation.
- Migrated environment variable access from direct process.env to centralized getEnv() utility function across all packages.
- Renamed environment variable prefix from OMP_ to PI_ throughout codebase (e.g., OMP_CODING_AGENT_DIR -> PI_CODING_AGENT_DIR).
- Removed automatic environment variable migration from PI_ to OMP_ prefixes via migrate-env.ts module.
- Removed env setting from configuration schema and applyEnvironmentVariables() method from settings.
- Updated CI/CD build configuration to use PI_COMPILED flag instead of OMP_COMPILED.
- Changed venvPath property in PythonRuntime from nullable (string | null) to optional (string | undefined).
- Added PATH environment variable merging on Windows to deduplicate and normalize path entries.
- Enhanced Git path detection to support multiple installation patterns (cmd, bin, usr/bin, mingw variants).
- Implemented path normalization and deduplication logic to prevent duplicate entries in PATH.
- Refactored Windows Git path discovery to return multiple candidate paths instead of single path.
- Removed `output_mode` parameter from grep tool, consolidating all output to content mode with file grouping and match headers.
- Renamed grep context parameters from `context_pre`/`context_post` to `pre`/`post` for improved clarity.
- Removed `n` (line numbers) parameter from grep tool as line numbers are now always displayed.
- Reformatted grep output to display numbered matches with file paths, line numbers, and context lines with consistent alignment.
- Introduced `SearchParams` struct in Rust grep implementation to simplify parameter passing and improve code maintainability.
- Made `normalize_env_key` function const-eligible for compile-time evaluation in shell module.
- Consolidated directory listing functionality from dedicated `ls` tool into the `read` tool.
- Removed the `ls` tool and all related exports, types, and configurations from the public API.
- Updated `read` tool to return formatted directory listings with modification times instead of redirecting to `ls` tool.
- Removed `bashInterceptor.simpleLs` setting and related interception logic from bash tool.
- Removed `ls.enabled` setting and related tool registration logic.
- Removed test cases for the `ls` tool and updated tool type definitions to remove `LsToolResultEvent`.
- Fixed `find` tool to return a single match when given a file path instead of failing with 'not a directory' error.
- Added `hasGlobChars` helper function to detect glob patterns and distinguish file paths from glob patterns.
- Extended `FindOperations` interface with optional `stat` method for distinguishing files from directories.
- Added test case verifying that `find` tool correctly returns a single file when given a file path.
- Added native shell execution API via brush-core with streaming output support and configurable timeouts.
- Migrated bash executor from persistent ptree-based shell sessions to native bindings with improved performance and simplified architecture.
- Removed persistent shell session module and replaced with native brush-core implementation for better resource management.
- Added executeShell() and abortShellExecution() functions to native bindings for shell command execution with cancellation support.
- Implemented shell execution with support for environment variables, working directory changes, and timeout handling.
- Replaced SettingsManager class with new Settings singleton providing synchronous get/set API and background persistence.
- Introduced settings-schema.ts as single source of truth for all configuration definitions with 100+ settings organized into logical groups.
- Migrated from method-based settings access (getTheme(), setTheme()) to path-based access using dot notation (settings.get('theme'), settings.set('theme', value)).
- Removed 2035-line settings-manager.ts file and replaced with modular settings.ts (693 lines) and settings-schema.ts (836 lines) for improved maintainability.
- Unified settings schema into single source of truth eliminating duplicate definitions across settings-defs.ts and settings-manager.ts.
- Added persistent shell session support for bash tool with environment variable preservation across commands.
- Added shellForceBasic setting to force bash/sh even if user's default shell is different (default: true).
- Added OMP_SHELL_PERSIST environment variable to control persistent shell behavior (set to 0 to disable).
- Restructured system prompt with coordinator-specific guidance for parallel task delegation.
- Simplified find tool API by removing separate `path` parameter and consolidating pattern parsing into a single `pattern` parameter that includes the search path.
- Added automatic recursive search for simple patterns like `*.ts` by implicitly prefixing them with `**/` when no explicit path is provided.
- Implemented `parsePatternPath()` function to intelligently extract base directory and glob pattern from user input, supporting patterns like `src/**/*.tsx`, `lib/*.json`, and `*.md`.
- Extracted process management utilities from coding-agent shell module into dedicated procmgr module in utils package.
- Migrated shell configuration retrieval to SettingsManager class with new getGlobalShellConfig() static method.
- Replaced custom killProcessTree() implementation with new terminate() function supporting graceful shutdown with timeout and AbortSignal.
- Updated ptree.ChildProcess to use generic type parameter for input stream masking and delegated process termination to procmgr.terminate().
- Centralized process management across coding-agent modules to use SettingsManager and procmgr utilities instead of standalone shell functions.
- Renamed package directory from packages/pi-utils to packages/utils.
- Updated all path aliases and references in tsconfig.base.json to reflect new package location.
- Updated workspace references in bun.lock and package.json to point to new packages/utils directory.
- Updated documentation and build scripts to reference the renamed utils package.
- Removed Prettier configuration files (.prettierignore and .prettierrc) and migrated formatting to Biome.
- Updated Biome configuration from version 2.3.11 to 2.3.12 and changed arrowParentheses rule from 'always' to 'asNeeded'.
- Pinned @biomejs/biome dependency to exact version 2.3.12 in package.json and bun.lock.
- Applied consistent arrow function formatting across 489 files by removing unnecessary parentheses around single parameters.
- Removed blank lines after comment blocks and reorganized imports for consistency across the codebase.
- Converted named imports from node modules (fs, path, os) to namespace imports across all packages.
- Extended extension loader error handling with isEacces and hasFsCode type guards.
- Converted readdirSync, readFileSync, and statSync to async readdir, readFile, stat across skills and agent discovery.
- Made scanDirectoryForSkills async and refactored custom directory scanning to use Promise.all for concurrent processing.
- Updated agent discovery to use fs/promises for async file reading and refactored helper patterns.
- Added AgentParsingError exception class for better error handling during agent parsing.
- Added filesystem error type guards (isEnoent, isEacces, isPerm, etc.) to pi-utils for safe error checking.
- Added color manipulation utilities to pi-utils for accessibility features.
- Added color-blind mode setting to settings manager.
- Migrated plugins, settings, and config modules from sync to async file operations.
- Updated error handling to use new pi-utils type guards for type-safe checking.
- Added tsconfig.publish.json files to all packages with optimized publish-time configuration.
- Updated all package.json scripts with prepublishOnly hooks for correct type checking during publish.
- Added @oh-my-pi/omp-stats path mappings to root tsconfig.json for consistent imports.
- Added WASM generation script for photon module and integrated into install:dev script.
- converted relative imports to path aliases ($c/*, $ai/*, $tui/*, etc.) across all packages
- added per-package tsconfig.json with complete path mappings for runtime resolution
- set importModuleSpecifier to non-relative for IDE auto-import preferences
- updated dev script to run from monorepo root for consistent path resolution
- Converted all tool implementations from factory functions to class-based architecture.
- Updated SDK exports to expose tool classes instead of create*Tool factory functions.
- Refactored tool instantiation patterns across all built-in tools and test files.
- Added proper TypeScript typing with AgentToolResult and AgentToolUpdateCallback interfaces.
- Added comprehensive apply-patch mode for edit tool with create, update, delete, rename operations.
- Converted edit tool from factory function to class-based implementation with improved API.
- Enhanced patch application with ambiguity detection, fuzzy matching, and better error handling.
- Added line ending preservation, BOM handling, and trailing newline policy for file formatting.
- Added validation for empty oldText and multi-file patch rejection to improve reliability.
- Refactored edit tool implementation with modular patch architecture.
- Moved edit tool implementation from edit/ to patch/ module.
- Updated import paths for EditToolDetails across core modules.
- Enhanced patch parsing with unified diff and Codex-style patch support.
- Improved fuzzy matching algorithms for more robust text location.
- Converted SettingsManager.create(), loadSettings(), discoverSkills(), loadSlashCommands(), buildSystemPrompt(), loadSkills(), loadProjectContextFiles(), and getShellConfig() from synchronous to asynchronous APIs.
- Changed capability provider load() method from supporting both sync and async to async-only by removing loadSync().
- Removed fs property from LoadContext interface in capability types.
- Added new fs.ts module with caching layer for filesystem operations using readFile, readDirEntries, readDir, walkUp, and cache management functions.
- Refactored all discovery providers (builtin, claude, cline, codex, cursor, gemini, github, mcp-json, ssh, vscode, windsurf) to use async file operations with Promise.all for parallel loading.
- Removed rulebook tool and migrated rules loading to use read tool instead.
- Reorganized prompt files into subdirectories: agents/, compaction/, and system/.
- Added Handlebars helpers for template rendering including list, join, table, codeblock, xml, when, pluralize, and arithmetic operations.
- Migrated prompt template rendering from simple string replacement to Handlebars-style templating with structured data objects.
- Refactored system prompt generation to pass structured data instead of pre-formatted strings.
- Removed rulebookRules property from ToolSession interface and updated all test files accordingly.
- Added in-memory session storage abstraction with SessionStorage interface and MemorySessionStorage implementation.
- Added configurable bash interceptor rules with pattern-based command interception settings.
- Added AbortSignal support to 80+ web scrapers for request cancellation.
- Changed task tool to require explicit task `id` field and single `agent` parameter at top level.
- Removed `submit_review` tool - reviewers now use `complete` tool with structured output.
- Replaced Date.now() and crypto.randomUUID() with nanoid() for unique ID generation throughout codebase.
- Added `all` parameter to edit tool for replacing all occurrences with fuzzy matching support.
- Added OpenRouter provider support for image generation when `OPENROUTER_API_KEY` is set.
- Renamed image tool from `gemini_image` to `generate_image` with updated default model.
- Added test cases for edit tool's `all: true` option covering multiple scenarios.
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