g3/analysis/memory.md

Project Memory

Updated: 2026-01-20T09:01:08Z | Size: 16.7k chars

Remember Tool Wiring

• crates/g3-core/src/tools/memory.rs [0..5000] - execute_remember(), get_memory_path(), merge_memory()
• crates/g3-core/src/tool_definitions.rs [11000..12000] - remember tool definition in create_core_tools()
• crates/g3-core/src/tool_dispatch.rs [48] - dispatch case for "remember"
• crates/g3-core/src/prompts.rs [4200..6500] - Project Memory section in native prompt
• crates/g3-cli/src/lib.rs [1472..1495] - read_project_memory() loads memory at startup

Context Window & Compaction

• crates/g3-core/src/context_window.rs [0..815] - ContextWindow, reset_with_summary(), should_compact(), thin_context()
• crates/g3-core/src/lib.rs [0..132483] - Agent struct, force_compact(), stream_completion_with_tools()

Session Storage & Continuation

• crates/g3-core/src/session_continuation.rs [0..541] - SessionContinuation, save_continuation(), load_continuation()
• crates/g3-core/src/paths.rs [0..133] - get_session_logs_dir(), get_thinned_dir(), get_session_file()
• crates/g3-core/src/session.rs - Session logging utilities

Tool System

• crates/g3-core/src/tool_definitions.rs [0..544] - create_core_tools(), create_tool_definitions(), ToolConfig
• crates/g3-core/src/tool_dispatch.rs [0..73] - dispatch_tool() routing

CLI Argument Parsing

• crates/g3-cli/src/lib.rs [270..380] - Cli struct with clap derive macros
• crates/g3-cli/src/lib.rs [1700..2200] - run_interactive() with / command handlers

Streaming Markdown Formatter

• crates/g3-cli/src/streaming_markdown.rs [21500..22500] - format_header() processes headers with inline formatting
• crates/g3-cli/tests/streaming_markdown_test.rs - Tests for markdown formatting including test_bold_inside_header, test_italic_inside_header, test_code_inside_header, test_mixed_formatting_inside_header

Auto-Memory Feature

• crates/g3-core/src/lib.rs [1459..1522] - send_auto_memory_reminder() sends reminder to LLM after tool calls
• crates/g3-core/src/lib.rs [1451..1454] - set_auto_memory() enables/disables auto-memory
• crates/g3-core/src/lib.rs [116] - tool_calls_this_turn: Vec<String> tracks tools called per turn
• crates/g3-cli/src/lib.rs [393] - auto_memory: bool CLI flag definition
• crates/g3-cli/src/lib.rs [641..642, 684..685] - Flag applied to agent in console/machine modes
• crates/g3-cli/src/lib.rs [1340..1350, 1394..1404] - Auto-memory reminder called in single-shot mode
• crates/g3-cli/src/lib.rs [1758, 1931, 2216] - Auto-memory reminder called in interactive mode

Tool Call Tracking

• crates/g3-core/src/lib.rs [2843..2855] - execute_tool_in_dir() tracks all tool calls for auto-memory

Agent Mode

• crates/g3-cli/src/lib.rs [695..910] - run_agent_mode() handles specialized agent execution with custom prompts
• crates/g3-cli/src/lib.rs [820..835] - Agent creation with Agent::new_with_custom_prompt()
• crates/g3-cli/src/lib.rs [837] - agent.set_agent_mode() enables agent-specific session tracking

CLI Entry Points and Modes

• crates/g3-cli/src/lib.rs [0..140000] - run() main entry, run_agent_mode(), run_accumulative_mode(), run_autonomous(), run_interactive(), run_interactive_machine()
• crates/g3-cli/src/lib.rs - execute_task() (~line 1990), execute_task_machine() (~line 2262) - duplicated retry logic

Retry Infrastructure

• crates/g3-core/src/retry.rs [0..12000] - execute_with_retry(), retry_operation(), RetryConfig, RetryResult - used by g3-planner but not g3-cli

UI Abstraction Layer

• crates/g3-core/src/ui_writer.rs [0..4500] - UiWriter trait, NullUiWriter
• crates/g3-cli/src/ui_writer_impl.rs [0..14000] - ConsoleUiWriter implementation
• crates/g3-cli/src/simple_output.rs [0..1200] - SimpleOutput helper (separate from UiWriter)

Feedback Extraction

• crates/g3-core/src/feedback_extraction.rs [0..22000] - extract_coach_feedback(), try_extract_from_session_log(), try_extract_from_native_tool_call()

Streaming Utilities

• crates/g3-core/src/streaming.rs [0..10000] - truncate_line(), truncate_for_display(), log_stream_error(), is_connection_error()

Background Process Management

• crates/g3-core/src/background_process.rs [0..3000] - BackgroundProcessManager, start(), list(), is_running(), get(), remove()
• Design: No stop() method - processes are stopped via shell tool using kill <pid>

Unified Diff Application

• crates/g3-core/src/utils.rs [5000..15000] - apply_unified_diff_to_string(), parse_unified_diff_hunks()
• Handles multi-hunk diffs, CRLF normalization, range constraints

Error Classification

• crates/g3-core/src/error_handling.rs [0..567 lines] - classify_error(), ErrorType, RecoverableError
• Priority order: rate limit > network > server > busy > timeout > token limit > context length
• Note: "Connection timeout" classifies as NetworkError (not Timeout) due to "connection" keyword priority

CLI Module Extractions

• crates/g3-cli/src/metrics.rs [0..5416] - TurnMetrics, format_elapsed_time(), generate_turn_histogram()
• crates/g3-cli/src/project_files.rs [0..5577] - read_agents_config(), read_project_readme(), read_project_memory(), extract_readme_heading()
• crates/g3-cli/src/coach_feedback.rs [0..4025] - extract_from_logs() for coach-player loop feedback extraction

Context Compaction

• crates/g3-core/src/compaction.rs [0..11213] - perform_compaction(), CompactionResult, CompactionConfig, calculate_capped_summary_tokens(), should_disable_thinking(), build_summary_messages(), apply_summary_fallback_sequence()
• Unified compaction used by both force_compact() and auto-compaction in stream_completion_with_tools()

Streaming Markdown Formatter (Code Blocks)

• crates/g3-cli/src/streaming_markdown.rs [693..735] - flush_incomplete() handles unclosed blocks at end of stream
• crates/g3-cli/src/streaming_markdown.rs [654..675] - emit_code_block() joins block_buffer and highlights code
• crates/g3-cli/src/streaming_markdown.rs [439..462] - process_in_code_block() detects closing fence on newline
• Bug fix: closing ``` without trailing newline must be detected in flush_incomplete(), not just process_in_code_block()

ACD (Aggressive Context Dehydration)

• crates/g3-core/src/acd.rs [0..22000] - Fragment, Fragment::new(), Fragment::save(), Fragment::load(), generate_stub(), list_fragments(), get_latest_fragment_id()
• crates/g3-core/src/tools/acd.rs [0..8500] - execute_rehydrate() tool implementation
• crates/g3-core/src/paths.rs [3200..3400] - get_fragments_dir() returns .g3/sessions/<session_id>/fragments/
• crates/g3-core/src/compaction.rs [195..240] - ACD integration in perform_compaction(), creates fragment and stub when acd_enabled
• crates/g3-core/src/context_window.rs [10100..10700] - reset_with_summary_and_stub() adds stub before summary
• crates/g3-cli/src/lib.rs [157..161] - --acd CLI flag
• crates/g3-cli/src/lib.rs [1476..1525] - /fragments and /rehydrate commands

ACD Fragment Storage Format

{
  "fragment_id": "abc123",
  "created_at": "2026-01-11T...",
  "messages": [...],
  "message_count": 47,
  "user_message_count": 23,
  "assistant_message_count": 24,
  "tool_call_summary": {"read_file": 4, "shell": 5},
  "estimated_tokens": 18500,
  "topics": ["implemented auth", "fixed bug"],
  "preceding_fragment_id": "xyz789"
}

UTF-8 Safe String Slicing Pattern

Problem: Rust string slices (&s[..n]) use byte indices, not character indices. Multi-byte UTF-8 characters (emoji, bullets •, ×, ⚡) cause panics if sliced mid-character.

Solution: Use char_indices() to find byte boundaries:

// Get byte index of the Nth character
let byte_idx = s.char_indices()
    .nth(char_limit)
    .map(|(i, _)| i)
    .unwrap_or(s.len());
let truncated = &s[..byte_idx];

// For length checks, use chars().count() not len()
if s.chars().count() <= max_len { ... }

Danger zones: Display truncation, ACD stubs, user input handling, any string with non-ASCII characters.

CLI Module Structure (Post-Refactor)

• crates/g3-cli/src/lib.rs [0..415] - Entry point, run(), mode dispatch, config loading
• crates/g3-cli/src/cli_args.rs [0..133] - Cli struct with clap derive macros, argument parsing
• crates/g3-cli/src/autonomous.rs [0..785] - run_autonomous(), coach-player feedback loop
• crates/g3-cli/src/agent_mode.rs [0..284] - run_agent_mode() specialized agent execution
• crates/g3-cli/src/accumulative.rs [0..343] - run_accumulative_mode() iterative requirements
• crates/g3-cli/src/interactive.rs [0..851] - run_interactive(), run_interactive_machine(), REPL with / commands
• crates/g3-cli/src/task_execution.rs [0..212] - execute_task_with_retry(), OutputMode enum - unified retry logic
• crates/g3-cli/src/utils.rs [0..91] - display_welcome_message(), get_workspace_path()

Studio - Multi-Agent Workspace Manager

• crates/studio/src/main.rs [0..12500] - cmd_run(), cmd_status(), cmd_accept(), cmd_discard(), extract_session_summary()
• crates/studio/src/session.rs - Session, SessionStatus, session metadata management
• crates/studio/src/git.rs - GitWorktree, git worktree management for isolated agent sessions

Session log format: Session logs are stored at <worktree>/.g3/sessions/<session_id>/session.json with structure:

{
  "context_window": {
    "conversation_history": [{"role": "...", "content": "..."}],
    "percentage_used": 45.2,
    "total_tokens": 200000,
    "used_tokens": 90400
  },
  "session_id": "...",
  "status": "...",
  "timestamp": "..."
}

Project Memory Location

• Memory is now stored at analysis/memory.md (version controlled, shared across worktrees)
• crates/g3-core/src/tools/memory.rs - get_memory_path() returns analysis/memory.md
• crates/g3-cli/src/project_files.rs - read_project_memory() reads from analysis/memory.md

Compact Tool Output

• crates/g3-cli/src/ui_writer_impl.rs - print_tool_compact() handles compact display for file ops and other tools
• crates/g3-core/src/streaming.rs - format_*_summary() functions for each tool type

Racket Code Search Support

Tree-sitter based syntax-aware search for Racket .rkt files.

• crates/g3-core/src/code_search/searcher.rs
  • Racket parser init [~line 45] - tree_sitter_racket::LANGUAGE
  • Extension mapping [~line 90] - .rkt, .rktl, .rktd → "racket"

Auto-Memory Reminder Format

Rich few-shot prompting for higher quality memory entries with per-symbol char ranges.

• crates/g3-core/src/lib.rs
  • send_auto_memory_reminder() [47800..48800] - MEMORY CHECKPOINT prompt with few-shot examples
• crates/g3-core/src/prompts.rs
  • Memory Format section [3800..4500] - system prompt template and examples

Language-Specific Prompt Injection

Auto-detects programming languages in workspace and injects toolchain guidance.

• crates/g3-cli/src/language_prompts.rs

  • LANGUAGE_PROMPTS [12..19] - static array of (lang_name, extensions, prompt_content)
  • detect_languages() [22..32] - scans workspace for language files
  • get_language_prompts_for_workspace() [88..108] - returns formatted prompt for detected languages
  • scan_directory_for_extensions() [42..77] - recursive scan with depth limit (2), skips hidden/vendor dirs

• prompts/langs/ - directory for language prompt markdown files

  • racket.md - Racket/raco toolchain guidance (compilation, testing, analysis, profiling)

• crates/g3-cli/src/project_files.rs

  • combine_project_content() [89..106] - now accepts language_content parameter

To add a new language:

1. Create prompts/langs/<lang>.md with toolchain guidance
2. Add entry to LANGUAGE_PROMPTS in language_prompts.rs with extensions

Agent-Specific Language Prompts

Injects agent+language-specific guidance when running in agent mode in a workspace with detected languages.

• crates/g3-cli/src/language_prompts.rs

  • AGENT_LANGUAGE_PROMPTS [21..26] - static array of (agent_name, lang_name, prompt_content) tuples
  • get_agent_language_prompt() [115..121] - looks up prompt for specific agent+lang combo
  • get_agent_language_prompts_for_workspace() [124..137] - uses detect_languages() then looks up agent-specific prompts

• crates/g3-cli/src/agent_mode.rs

  • Lines 149-159 - calls get_agent_language_prompts_for_workspace() and appends to system prompt

• prompts/langs/<agent>.<lang>.md - file naming pattern for agent+lang prompts

  • prompts/langs/carmack.racket.md - Racket-specific guidance for carmack agent

To add a new agent+lang prompt:

1. Create prompts/langs/<agent>.<lang>.md
2. Add entry to AGENT_LANGUAGE_PROMPTS in language_prompts.rs with include_str!

MockProvider for Testing

Configurable mock LLM provider for integration testing without real API calls.

• crates/g3-providers/src/mock.rs

  • MockProvider [220..320] - mock provider with response queue, request tracking
  • MockResponse [35..200] - configurable response with chunks and usage
  • MockChunk [45..100] - individual streaming chunk (content, finished, tool_calls)
  • scenarios module [410..480] - preset scenarios: text_only_response(), multi_turn(), tool_then_response()

• crates/g3-core/tests/mock_provider_integration_test.rs

  • test_butler_bug_scenario() - reproduces consecutive user messages bug
  • test_text_only_response_saves_to_context() - verifies text responses saved
  • test_multi_turn_text_only_maintains_alternation() - verifies user/assistant alternation

Usage pattern:

let provider = MockProvider::new()
    .with_response(MockResponse::text("Hello!"));
let mut registry = ProviderRegistry::new();
registry.register(provider);
let agent = Agent::new_for_test(config, NullUiWriter, registry).await?;

G3 Status Message Formatting

Centralized formatting for all "g3:" prefixed system status messages.

• crates/g3-cli/src/g3_status.rs
  • G3Status - static methods for consistent status message formatting
  • Status enum - Done, Failed, Error(String), Custom(String), Resolved, Insufficient
  • progress() [64..76] - prints "g3: ..." (no newline, stays on same line)
  • progress_ln() [79..90] - prints "g3: ..." with newline
  • done() [93..101] - prints bold green "[done]"
  • failed() [104..111] - prints red "[failed]"
  • error() [114..122] - prints red "[error: ]"
  • status() [125..152] - dispatches to appropriate status method
  • complete() [155..158] - one-shot progress + status
  • info_inline() [168..178] - ANSI escape to append to previous line
  • format_status() [181..214] - returns formatted status string
  • resuming() [227..236] - session resume message with cyan session ID
  • resuming_summary() [239..248] - resume with "(summary)" note

ThinResult Struct

Semantic data for context thinning operations, replacing pre-formatted strings.

• crates/g3-core/src/context_window.rs

  • ThinResult [16..36] - struct with scope, before/after percentages, counts, chars_saved, had_changes
  • thin_context_with_scope() [373..450] - returns ThinResult instead of (String, usize)
  • build_thin_result() [720..740] - constructs ThinResult from operation data

• crates/g3-core/src/ui_writer.rs

  • print_thin_result(&self, result: &ThinResult) [31] - trait method for UI formatting

• crates/g3-cli/src/g3_status.rs

  • Status::NoChanges [42] - new status variant for thinning with no changes
  • G3Status::thin_result() [265..292] - formats ThinResult with proper colors/styling

CLI Display Utilities

Shared display functions for interactive and agent modes.

• crates/g3-cli/src/display.rs
  • format_workspace_path() [9..17] - formats path with ~ for home dir
  • print_workspace_path() [20..29] - prints formatted workspace path
  • LoadedContent [32..39] - tracks loaded project files (README, AGENTS.md, Memory, include prompt)
  • print_loaded_status() [87..103] - prints "✓ README ✓ AGENTS.md" status line
  • print_project_heading() [106..114] - prints project name from README

Interactive Commands Module

Handles / commands in interactive mode (extracted from interactive.rs).

• crates/g3-cli/src/commands.rs
  • handle_command() [17..320] - dispatches /help, /compact, /thinnify, /skinnify, /fragments, /rehydrate, /run, /dump, /clear, /readme, /stats, /resume
  • Returns Result<bool> - true if command handled and loop should continue