- Added streamed tool intent display in working message to show real-time intent tracking during agent execution.
- Changed intent tracing field name from `$intent` to `_intent` across tool schemas and agent core for consistency.
- Added support for file deletion and renaming operations in hashline edit mode.
- Renamed hashline edit operation fields: `set` to `target`/`new_content`, `set_range` to `first`/`last`/`new_content`, `insert` to `inserted_lines`.
- Redesigned hashline edit API with new operation names (set, set_range, insert) and structured body parameter accepting string arrays for multiline edits.
- Changed hashline reference format from LINE:HASH to LINE#ID throughout tools and documentation for improved clarity.
- Enhanced insert operation to support optional before/after anchors enabling flexible insertion positioning and boundary echo stripping.
- Made hashline autocorrect heuristics conditional on PI_HL_AUTOCORRECT environment variable for controlled behavior.
- Added benchmark reports for claude-haiku-4-5 and GPT-5.2-Codex models demonstrating hashline edit variant performance.
- Fixed terminal output handling to properly queue and serialize writes, preventing dropped or corrupted output in interactive bash sessions.
- Implemented write queue with callback-based draining to ensure sequential terminal writes.
- Removed try-catch fallback in output handling, relying on queued serialization for correctness.
- Added streaming text preview during agent specification generation with real-time text delta updates.
- Added `onRequestRender` callback to agent dashboard for async UI re-renders on state changes.
- Improved system prompt preview rendering with text wrapping and line count indicators.
- Enhanced agent creation flow to display generation status hint and reordered spec review before input form.
- Added AI-powered agent creation flow with architect model for generating custom agent specifications from natural language requests.
- Added keyboard shortcuts (N for new agent, R for regenerate) and scope selection (project/user) for agent creation workflow.
- Added model suggestions UI and success/error notices to agent dashboard for improved creation feedback.
- Added system prompts for agent-creation-architect and agent-creation-user roles with 6-step methodology and JSON schema validation.
- Added file persistence with YAML frontmatter for storing agent specifications at project or user scope.
- Added AgentBusyError exception class for concurrent operation handling across agent packages.
- Added automatic retry logic with 30-second timeout for agent prompts when agent is busy.
- Changed concurrent operation errors from generic Error to AgentBusyError for better error handling.
- Fixed model discovery to use default refresh mode instead of explicit 'online' parameter.
- Extracted model priority configuration from TypeScript constants to external priority.json file.
- Updated agent prompts (reviewer, explore, plan) to reference new model tier aliases (pi/slow, pi/smol, pi/plan).
- Removed hardcoded SMOL_MODEL_PRIORITY and SLOW_MODEL_PRIORITY constants from model-resolver.ts.
- Improved prompt formatting with consistent newlines and whitespace in agent configuration files.
- Fixed system prompt to enforce tool calls on every turn until task completion, preventing premature stopping before turn finish.
- Reorganized contract and diligence sections to clarify inviolable rules and completion requirements.
- Consolidated redundant completion guidance and removed duplicate prime directive language.
- Clarified contract rule 2 to explicitly require at least one tool call per turn unless task is complete.
- Added new contract rule 3 forbidding standalone progress updates without task continuation.
- Renumbered subsequent contract rules 3-7 to 4-8 to accommodate new rule.
- Reinforced critical section guidance with same tool call requirement for turn validity.
- Restructured execution procedure guidance to emphasize scope assessment and continuous tool-driven progress over planning-first approach.
- Updated task tracking instructions to prohibit metadata-only turns and require immediate completion marking of todo items.
- Clarified parallel execution guidance to distinguish between genuine parallelization and sequential work, with explicit criteria for Task tool usage.
- Modified output style requirements to mandate stating intent before tool calls and reordered style constraints for clarity.
- Reinforced requirement that every turn must include at least one tool call advancing the deliverable, with explicit failure condition for planning-only turns.
- Added prime directive section emphasizing completion of requested output as primary objective.
- Clarified hashline anchor format to emphasize `LINE:HASH` only without content suffix.
- Added explicit guidance on `set_line` with empty text behavior versus `replace_lines` for deletion.
- Added instruction to prefer `insert_after` over line replacement when adding fields/arguments/imports.
- Added common failure patterns section documenting anchor copying errors and wide range pitfalls.
- Updated all example tool calls to use concrete `LINE:HASH` format instead of template placeholders.
- Added `repeatToolDescriptions` configuration setting to control tool description rendering in system prompts.
- Implemented conditional tool display logic that renders full tool descriptions when enabled or a concise comma-separated list when disabled.
- Threaded `repeatToolDescriptions` setting through SDK and system prompt building pipeline.
- Added autonomous memory extraction and consolidation system with two-phase pipeline for extracting durable knowledge and consolidating into reusable skills.
- Added /memory slash command with subcommands (view, clear, reset, enqueue, rebuild) for inspecting and managing memory maintenance.
- Added configurable memory settings including concurrency limits, lease timeouts, token budgets, and rollout age constraints.
- Added memory injection payload that includes learned context in system prompts with operational rules for reading and using memory artifacts.
- Improved system prompt building to support memory guidance injection and enhanced error handling in resolvePromptInput function for multiline input.
- 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.
- [ { "text": "Updated runner tool arguments from 'read,edit,write,ls' to 'read,edit,write' with '--no-skills' flag in single task execution.", "user_visible": false }, { "text": "Updated runner tool arguments from 'read,edit,write,ls' to 'read,edit,write' with '--no-skills' flag in batch execution.", "user_visible": false } ], "issue_refs">.
- 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.
- Added noopEdits array to applyHashlineEdits return type to track edits that produce no changes.
- Added validation to reject edits with wrong-format fields (old_text/new_text from replace mode, diff from patch mode) that indicate model confusion.
- Added additionalProperties tolerance to hashline edit schemas to allow flexible field handling.
- Added deduplication logic to remove duplicate edits targeting the same line(s) with identical destination content.
- Improved error handling for missing end fields in edit ranges by returning single-line specs instead of requiring both start and end.
- Enhanced no-op error recovery guidance in prompts with detailed instructions to re-read file and function context after consecutive no-op errors.
- Renamed hashline edit operation types from replaceLine/replaceLines to single/range for improved clarity.
- Renamed content field to replacement in hashline edit operations to better reflect its purpose.
- Enhanced no-op edit diagnostics to perform line-by-line comparisons and distinguish between identical and normalized replacements.
- Improved error messages for hashline edits to clarify differences between literal identical content and whitespace-normalized content.
- Removed timeout-retries configuration option from react-edit-benchmark CLI and simplified retry logic.
- Updated all test cases and documentation to reflect renamed hashline edit operation types and fields.
- Removed insertBefore and substr hashline edit operations, simplifying the edit API to support only replaceLine, replaceLines, and insertAfter operations.
- Updated hashline edit schema and type definitions to remove insertBefore and substr operation types from the ParsedRefs union and edit validation logic.
- Removed insertBefore and substr test cases from hashline test suite, including tests for insert-before functionality, anchor echo stripping, and substring matching.
- Updated benchmark runner to refactor edit operations from src/dst format to discriminated union types (replaceLine, replaceLines, insertAfter) and adjusted insertAfter line references.
- Added remaps property to HashlineMismatchError to store a map of stale references to their corrected versions with quick fix suggestions.
- Added diagnostic output for no-op edits that displays target lines from failed edit operations to help users understand why edits had no effect.
- Added computeLineHash and parseLineRef helper functions to public exports for use in diagnostic and validation logic.
- Enhanced error messages in HashlineMismatchError with quick fix suggestions showing stale references and their corrected versions.
- Updated hashline edit tool documentation with critical guidelines on preserving formatting, recovery procedures, and pre-submission verification checklist.
- Redesigned hashline edit API to use discriminated union variants (replaceLine, replaceLines, insertAfter, insertBefore, substr) instead of nested src/dst structure.
- Changed hash algorithm from xxHash64 hex to xxHash32 base36 encoding and increased hash length from 2 to 3 characters.
- Added substr edit variant to match and replace content by unique substring when line hashes are unavailable.
- Implemented line relocation heuristics to resolve stale line references when hash uniquely identifies a moved line.
- Moved substr needle search from edit application phase to pre-validation phase for earlier error detection.
- Migrated hashline edit type definitions from manual TypeScript interfaces to schema-derived types using Static<typeof schema> pattern.
- Added `substr` source specification kind to match and replace lines by unique substring without requiring line-hash references.
- Implemented substring matching logic in hashline edits with validation for uniqueness and error handling for not-found and ambiguous cases.
- Added schema definition and type guards for the new `substr` operation type across patch system.
- Added mutation preview hints to error messages when edits fail with 'No changes made' errors, showing line numbers, hashes, and added/removed lines.
- Changed formatter to pin JavaScript fixtures to the flow parser to avoid parser-dependent formatting drift.
- Added whitespace preservation logic to treat whitespace-only differences as passing in file verification.
- Removed substring source specification kind from hashline edits, requiring users to use line-hash references instead.
- Simplified SrcSpec type to use generic type parameter for line references, removing substring variant from union.
- Updated react-edit-benchmark to use --max-tasks option for deterministic task sampling and changed default batch sizes to 1.
- Changed `HashlineEdit.src` from string format (e.g., `"5:ab"`, `"5:ab..9:ef"`) to structured `SrcSpec` object with discriminated union types (`{ kind: "single", ref: "..." }`, `{ kind: "range", start: "...", end: "..." }`, `{ kind: "insertAfter", after: "..." }`, `{ kind: "insertBefore", before: "..." }`, `{ kind: "substring", needle: "..." }`).
- Refactored `parseSrc` function to `parseSrcSpec` to handle structured `SrcSpec` objects instead of string parsing, replacing string validation and delimiter parsing logic with explicit case handling for each operation kind.
- Updated tool schema in `index.ts` to define `srcSpecSchema` as a discriminated union type with five variants, replacing the previous simple string-based `src` parameter definition.
- Added substring-based source matching for hashline edits to support matching lines by content when hash references are unavailable.
- Added automatic detection and repair of single-line merges where models incorrectly combine multiple lines into one.
- Added normalization of Unicode-confusable hyphens to ASCII hyphens to handle model-generated variations.
- Added heuristics to restore indentation and preserve wrapped line formatting during edits.
- Relaxed comma validation in src to allow commas while rejecting inputs with multiple line references.
- Enhanced parseLineRef to accept shorter hash prefixes instead of requiring exact hash matches.
- Improved error messages for hash mismatches to provide more actionable guidance.
- Replaced HashlineEdit API from old/new/after fields to src/dst fields with unified range syntax supporting single lines, ranges, insert-after, and insert-before operations.
- Added parseSrc() function to parse structured line references from src strings supporting formats like '5:ab', '5:ab..9:ef', '5:ab..', and '..5:ab'.
- Added heuristics to strip anchor line echoes and range boundary echoes from model-generated replacement content.
- Implemented preserveWhitespaceOnlyLinesLoose() for improved whitespace preservation using loose matching strategy when replacement line counts don't match.
- Added comprehensive benchmark reports for Claude Sonnet 4.5, Gemini 2.5 Flash Lite, and GPT-5.1 Codex Mini models evaluating hashline edit performance across 60 tasks.
- Added automatic stripping of `LINE:HASH|` display prefixes and unified-diff `+` markers from replacement content in hashline edits.
- Enhanced replace edits to preserve original whitespace on lines where only whitespace differs, preventing spurious formatting diffs when models reformat code.
- Added helper functions `stripNewLinePrefixes()`, `preserveWhitespaceOnlyLines()`, and `equalsIgnoringWhitespace()` to improve edit robustness.
- Enhanced system prompt to display tool descriptions alongside tool names for improved clarity on available capabilities.
- Added toolDescriptions data structure to system prompt rendering context, mapping tool names to their descriptions from the tools registry.
- Updated system prompt template to render tools in structured XML format with name and description elements instead of comma-separated list.
- Added `toArray()` helper function to normalize `string | string[]` inputs for hashline edit operations with comma-separated line reference support.
- Added `HashlineMismatchError` class that displays grep-style output with `>>>` markers for hash validation failures.
- Added `HashMismatch` type for representing individual hash mismatches with line number, expected hash, and actual hash.
- Updated `HashlineEdit` type to accept `string | string[]` for `old` and `new` fields, allowing both singular and plural input formats.
- Reduced hash length from 4 to 2 hex characters (16-bit hashes) for more concise line references.
- Enhanced `parseLineRef()` to strip display-format suffixes and `validateLineRef()` to throw `HashlineMismatchError` with context lines for better error reporting.
- Added HashlineMismatchError class with formatted error messages showing mismatched hashes with context lines.
- Added HashMismatch type to represent hash validation errors with line number, expected, and actual hash values.
- Enhanced hash validation in applyHashlineEdits to collect all hash mismatches before applying edits instead of failing on first mismatch.
- Renamed HashlineEdit fields from 'src'/'dst' to 'old'/'new' for improved naming clarity and consistency.
- Added hashline edit mode for line-addressed edits using hash-verified line references with xxHash64 integrity verification.
- Replaced `edit.patchMode` boolean setting with `edit.mode` enum supporting 'replace', 'patch', and 'hashline' modes.
- Added `readHashLines` configuration setting to include line hashes in read output for hashline edit mode.
- Implemented `computeLineHash`, `formatHashLines`, `parseLineRef`, `validateLineRef`, and `applyHashlineEdits` utility functions for hashline operations.
- Updated read tool to support optional `hashes` parameter and prioritize hash lines over line numbers when both are requested.
- Changed `getEditModelVariants()` return type from `Record<string, 'patch' | 'replace'>` to `Record<string, EditMode | null>` and removed hardcoded model-specific defaults.
- Clarified that subagents automatically inherit full system prompt including AGENTS.md, context files, and skills -- do not repeat project rules or conventions in task context.
- Updated task context guidance to focus on session-specific information subagents lack, eliminating redundant documentation of project constraints already available to them.
- Refined constraints template to emphasize task-specific rules and session decisions rather than global project conventions.
- Expanded anti-patterns section to explicitly flag redundant context that wastes tokens by repeating AGENTS.md rules, project constraints, and tool preferences.
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