Compact workspace memory: -29% chars, 37 concepts preserved

Agent: huffman

Compaction Summary:
- Lines: 576 → 477 (-17%)
- Chars: 36,372 → 26,173 (-28%)
- Entries: 45 → 37 (merged 8)

Transformations:
- Removed 1 exact duplicate (Datalog Program Generation x2)
- Collapsed 6 log-style bug narratives to current-state declarations
- Merged Plan Verification into Plan Mode entry
- Merged Rulespec Changes into Invariants entry (current state only)
- Updated 12 stale char ranges against actual file positions
- Removed 13 references to deleted code (extraction.rs, shadow_datalog_verify,
  save/load_compiled_rulespec, display_welcome_message, OutputMode, etc.)
- Moved Skills System Entry Points from AGENTS.md to memory (was duplicate)
- AGENTS.md: removed 20-line skills table, kept rules/invariants only

analysis/memory.md

@@ -1,99 +1,121 @@
 # Workspace Memory
-> Updated: 2026-02-12T05:23:04Z | Size: 31.1k chars
+> Updated: 2026-02-13 | Size: ~20k 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 in `create_core_tools()`
-- `crates/g3-core/src/tool_dispatch.rs` [48] - dispatch case
+- `crates/g3-core/src/tools/memory.rs` [0..5686]
+  - `get_memory_path()` [486] - resolves `analysis/memory.md`
+  - `execute_remember()` [1066] - tool handler
+  - `merge_memory()` [2324] - merges new notes into existing
+- `crates/g3-core/src/tool_definitions.rs` [956..] - remember tool in `create_core_tools()`
+- `crates/g3-core/src/tool_dispatch.rs` [670] - dispatch case
 - `crates/g3-core/src/prompts.rs` [4200..6500] - Workspace Memory prompt section
 - `crates/g3-cli/src/project_files.rs` - `read_workspace_memory()` loads `analysis/memory.md`
 
 ### Context Window & Compaction
-- `crates/g3-core/src/context_window.rs` [0..29568]
-  - `ThinResult` [23] - scope, before/after %, chars_saved
-  - `ContextWindow` - token tracking, message history
-  - `reset_with_summary()` - compact history to summary
-  - `should_compact()` - threshold check (80%)
-  - `thin_context()` - replace large results with file refs
+- `crates/g3-core/src/context_window.rs` [0..43282]
+  - `ThinResult` [765] - scope, before/after %, chars_saved
+  - `ContextWindow` [2220] - token tracking, message history
+  - `add_message_with_tokens()` [3171] - preserves messages with `tool_calls` even if content empty
+  - `estimate_message_tokens()` [7695] - sums content + tool_calls[].input tokens (chars/3 * 1.1 + 20 overhead)
+  - `should_compact()` [8954] - threshold check (80%)
+  - `reset_with_summary()` [10685] - compact history to summary
+  - `reset_with_summary_and_stub()` [11120] - ACD integration
+  - `extract_preserved_messages()` [13199] - strips `tool_calls` from last assistant to prevent orphaned `tool_use`
+  - `thin_context()` [15038] - replace large results with file refs
 - `crates/g3-core/src/compaction.rs` [0..11404]
   - `CompactionResult`, `CompactionConfig` - result/config structs
   - `perform_compaction()` - unified for force_compact() and auto-compaction
   - `calculate_capped_summary_tokens()`, `should_disable_thinking()`
   - `build_summary_messages()`, `apply_summary_fallback_sequence()`
-- `crates/g3-core/src/lib.rs` - `Agent.force_compact()`, `stream_completion_with_tools()`
+  - ACD integration [195..240] - creates fragment+stub during compaction
+- `crates/g3-core/src/lib.rs`
+  - `force_compact()` [47902]
+  - `stream_completion_with_tools()` [85389] - main agent loop
 
 ### 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
+- `crates/g3-core/src/session_continuation.rs` [0..22907]
+  - `SessionContinuation` [1024]
+  - `save_continuation()` [5581]
+  - `load_continuation()` [6428]
+- `crates/g3-core/src/paths.rs` [0..5498]
+  - `get_session_logs_dir()` [2434]
+  - `get_thinned_dir()` [3060]
+  - `get_fragments_dir()` [3295] - `.g3/sessions/<id>/fragments/`
+  - `get_session_file()` [3517]
+- `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
+- `crates/g3-core/src/tool_definitions.rs` [0..15391]
+  - `ToolConfig` [381]
+  - `create_tool_definitions()` [742]
+  - `create_core_tools()` [956]
+- `crates/g3-core/src/tool_dispatch.rs` [0..3983] - `dispatch_tool()` [670] routing
 
 ### CLI Module Structure
-- `crates/g3-cli/src/lib.rs` [0..415] - `run()`, mode dispatch, config loading
-- `crates/g3-cli/src/cli_args.rs` [0..133] - `Cli` struct (clap)
-- `crates/g3-cli/src/autonomous.rs` [0..785] - `run_autonomous()`, coach-player loop
-- `crates/g3-cli/src/agent_mode.rs` [0..284] - `run_agent_mode()`, `Agent::new_with_custom_prompt()`
-- `crates/g3-cli/src/accumulative.rs` [0..343] - `run_accumulative_mode()`
-- `crates/g3-cli/src/interactive.rs` [0..851] - `run_interactive()`, `run_interactive_machine()`, REPL
-- `crates/g3-cli/src/task_execution.rs` [0..212] - `execute_task_with_retry()`, `OutputMode`
-- `crates/g3-cli/src/commands.rs` [17..320] - `/help`, `/compact`, `/thinnify`, `/fragments`, `/rehydrate`
-- `crates/g3-cli/src/utils.rs` [0..91] - `display_welcome_message()`, `get_workspace_path()`
-- `crates/g3-cli/src/display.rs` - `format_workspace_path()`, `LoadedContent`, `print_loaded_status()`
+- `crates/g3-cli/src/lib.rs` [0..9309] - `run()` [1242], mode dispatch, config loading
+- `crates/g3-cli/src/cli_args.rs` [0..6043] - `Cli` [1374] struct (clap)
+- `crates/g3-cli/src/autonomous.rs` [0..25630] - `run_autonomous()` [638], coach-player loop
+- `crates/g3-cli/src/agent_mode.rs` [0..13558] - `run_agent_mode()` [1000]
+- `crates/g3-cli/src/accumulative.rs` [0..12006] - `run_accumulative_mode()` [796]
+- `crates/g3-cli/src/interactive.rs` [0..19222] - `run_interactive()` [3809], REPL
+- `crates/g3-cli/src/task_execution.rs` [0..5520] - `execute_task_with_retry()` [1069]
+- `crates/g3-cli/src/commands.rs` [0..20115] - `/help`, `/compact`, `/thinnify`, `/fragments`, `/rehydrate`
+- `crates/g3-cli/src/utils.rs` [0..6154] - `display_context_progress()`, `setup_workspace_directory()`, `load_config_with_cli_overrides()`
+- `crates/g3-cli/src/display.rs` [0..12573] - `format_workspace_path()` [286], `LoadedContent`, `print_loaded_status()`
 
 ### Auto-Memory System
 - `crates/g3-core/src/lib.rs`
-  - `send_auto_memory_reminder()` [47800..48800] - MEMORY CHECKPOINT prompt
-  - `set_auto_memory()` [1451..1454] - enable/disable
-  - `tool_calls_this_turn` [116] - tracks tools per turn
-  - `execute_tool_in_dir()` [2843..2855] - records tool calls
+  - `tool_calls_this_turn` [5272] - tracks tools per turn
+  - `set_auto_memory()` [64643] - enable/disable
+  - `send_auto_memory_reminder()` [72800] - MEMORY CHECKPOINT prompt
+  - `execute_tool_in_dir()` [132582] - records tool calls
 - `crates/g3-core/src/prompts.rs` [3800..4500] - Memory Format in system prompt
-- `crates/g3-cli/src/lib.rs` [393] - `--auto-memory` CLI flag
+- `crates/g3-cli/src/lib.rs` - `--auto-memory` CLI flag
 
 ### Streaming Markdown Formatter
-- `crates/g3-cli/src/streaming_markdown.rs`
-  - `format_header()` [21500..22500] - headers with inline formatting
-  - `process_in_code_block()` [439..462] - detects closing fence
-  - `emit_code_block()` [654..675] - joins buffer, highlights code
-  - `flush_incomplete()` [693..735] - handles unclosed blocks at stream end
+- `crates/g3-cli/src/streaming_markdown.rs` [0..37669]
+  - `process_in_code_block()` [17159] - detects closing fence
+  - `format_header()` [21339] - headers with inline formatting
+  - `emit_code_block()` [27134] - joins buffer, highlights code
+  - `flush_incomplete()` [28434] - handles unclosed blocks at stream end
 - `crates/g3-cli/tests/streaming_markdown_test.rs` - header formatting tests
 - **Gotcha**: closing ``` without trailing newline must be detected in `flush_incomplete()`
 
 ### Retry Infrastructure
-- `crates/g3-core/src/retry.rs` [0..12000] - `execute_with_retry()`, `retry_operation()`, `RetryConfig`, `RetryResult`
+- `crates/g3-core/src/retry.rs` [0..11865] - `execute_with_retry()`, `retry_operation()`, `RetryConfig`, `RetryResult`
 - `crates/g3-cli/src/task_execution.rs` - `execute_task_with_retry()`
 
 ### UI Abstraction Layer
-- `crates/g3-core/src/ui_writer.rs` [0..4500] - `UiWriter` trait, `NullUiWriter`, `print_thin_result()`
+- `crates/g3-core/src/ui_writer.rs` [0..8007] - `UiWriter` trait [211], `NullUiWriter` [6538], `print_thin_result()` [1136]
 - `crates/g3-cli/src/ui_writer_impl.rs` [0..14000] - `ConsoleUiWriter`, `print_tool_compact()`
 - `crates/g3-cli/src/simple_output.rs` [0..1200] - `SimpleOutput` helper
 
 ### 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()`
+- `crates/g3-core/src/feedback_extraction.rs` [0..22455] - `extract_coach_feedback()`, `try_extract_from_session_log()`, `try_extract_from_native_tool_call()`
 - `crates/g3-cli/src/coach_feedback.rs` [0..4025] - `extract_from_logs()` for coach-player loop
 
 ### Streaming Utilities & State
-- `crates/g3-core/src/streaming.rs` [0..26146]
-  - `MAX_ITERATIONS` [13] - constant (400)
-  - `StreamingState` [16] - cross-iteration: full_response, first_token_time, iteration_count
-  - `ToolOutputFormat` [54] - enum: SelfHandled, Compact(String), Regular
-  - `IterationState` [166] - per-iteration: parser, current_response, tool_executed
-  - `truncate_line()`, `truncate_for_display()`, `log_stream_error()`, `is_connection_error()`
-  - `format_tool_result_summary()`, `is_compact_tool()`, `format_compact_tool_summary()`
-- `crates/g3-core/src/lib.rs` [1879..2712] - `stream_completion_with_tools()` main loop
+- `crates/g3-core/src/streaming.rs` [0..27241]
+  - `MAX_ITERATIONS` [419] - constant (400)
+  - `StreamingState` [499] - cross-iteration: full_response, first_token_time, iteration_count
+  - `ToolOutputFormat` [1606] - enum: SelfHandled, Compact(String), Regular
+  - `format_tool_result_summary()` [1743], `is_compact_tool()` [2635], `format_compact_tool_summary()` [3179]
+  - `IterationState` [5061] - per-iteration: parser, current_response, tool_executed
+  - `log_stream_error()` [8017], `truncate_for_display()` [10887], `truncate_line()` [11247]
+  - `is_connection_error()` [21620]
 
 ### Background Process Management
-- `crates/g3-core/src/background_process.rs` [0..3000] - `BackgroundProcessManager`, `start()`, `list()`, `is_running()`, `get()`, `remove()`
-- No `stop()` method - use shell `kill <pid>`
+- `crates/g3-core/src/background_process.rs` [0..9048]
+  - `BackgroundProcessManager` [1466], `start()` [2601], `list()` [5527], `get()` [5731], `is_running()` [5934], `remove()` [6462]
+- No `stop()` method — use shell `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] - `classify_error()`, `ErrorType`, `RecoverableError`
+- `crates/g3-core/src/error_handling.rs` [0..19454]
+  - `ErrorType` [5206], `RecoverableError` [5465] (enum), `classify_error()` [5972]
 - Priority: rate limit > network > server > busy > timeout > token limit > context length
 - **Gotcha**: "Connection timeout" → NetworkError (not Timeout) due to "connection" keyword priority
 
@@ -106,12 +128,8 @@ Saves conversation fragments to disk, replaces with stubs.
 - `crates/g3-core/src/acd.rs` [0..22830]
   - `Fragment` - `new()`, `save()`, `load()`, `generate_stub()`, `list_fragments()`, `get_latest_fragment_id()`
 - `crates/g3-core/src/tools/acd.rs` [0..8500] - `execute_rehydrate()` tool
-- `crates/g3-core/src/paths.rs` [3200..3400] - `get_fragments_dir()` → `.g3/sessions/<id>/fragments/`
-- `crates/g3-core/src/compaction.rs` [195..240] - ACD integration, creates fragment+stub
-- `crates/g3-core/src/context_window.rs` [10100..10700] - `reset_with_summary_and_stub()`
-- `crates/g3-cli/src/lib.rs` [157..161] - `--acd` flag; [1476..1525] - `/fragments`, `/rehydrate`
-
-**Fragment JSON**: `fragment_id`, `created_at`, `messages`, `message_count`, `user_message_count`, `assistant_message_count`, `tool_call_summary`, `estimated_tokens`, `topics`, `preceding_fragment_id`
+- `crates/g3-cli/src/lib.rs` - `--acd` flag; `/fragments`, `/rehydrate` commands
+- **Fragment JSON**: `fragment_id`, `created_at`, `messages`, `message_count`, `user_message_count`, `assistant_message_count`, `tool_call_summary`, `estimated_tokens`, `topics`, `preceding_fragment_id`
 
 ### UTF-8 Safe String Slicing
 Rust `&s[..n]` panics on multi-byte chars (emoji, CJK) if sliced mid-character.
@@ -122,9 +140,8 @@ Rust `&s[..n]` panics on multi-byte chars (emoji, CJK) if sliced mid-character.
 - `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`
 - `crates/studio/src/git.rs` - `GitWorktree` for isolated agent sessions
-
-**Session log**: `<worktree>/.g3/sessions/<session_id>/session.json`
-**Fields**: `context_window.{conversation_history, percentage_used, total_tokens, used_tokens}`, `session_id`, `status`, `timestamp`
+- **Session log**: `<worktree>/.g3/sessions/<session_id>/session.json`
+- **Fields**: `context_window.{conversation_history, percentage_used, total_tokens, used_tokens}`, `session_id`, `status`, `timestamp`
 
 ### Racket Code Search Support
 - `crates/g3-core/src/code_search/searcher.rs`
@@ -135,17 +152,15 @@ Rust `&s[..n]` panics on multi-byte chars (emoji, CJK) if sliced mid-character.
 Auto-detects languages and injects toolchain guidance.
 
 - `crates/g3-cli/src/language_prompts.rs`
-  - `LANGUAGE_PROMPTS` [12..19] - (lang_name, extensions, prompt_content)
-  - `AGENT_LANGUAGE_PROMPTS` [21..26] - (agent_name, lang_name, prompt_content)
-  - `detect_languages()` [22..32] - scans workspace
-  - `scan_directory_for_extensions()` [42..77] - recursive, depth 2, skips hidden/vendor
-  - `get_language_prompts_for_workspace()` [88..108]
-  - `get_agent_language_prompts_for_workspace()` [124..137]
-- `crates/g3-cli/src/agent_mode.rs` [149..159] - appends agent-specific prompts
+  - `LANGUAGE_PROMPTS` - (lang_name, extensions, prompt_content)
+  - `AGENT_LANGUAGE_PROMPTS` - (agent_name, lang_name, prompt_content)
+  - `detect_languages()` - scans workspace
+  - `scan_directory_for_extensions()` - recursive, depth 2, skips hidden/vendor
+  - `get_language_prompts_for_workspace()`, `get_agent_language_prompts_for_workspace()`
+- `crates/g3-cli/src/agent_mode.rs` - appends agent-specific prompts
 - `prompts/langs/` - language prompt files
-
-**To add language**: Create `prompts/langs/<lang>.md`, add to `LANGUAGE_PROMPTS`
-**To add agent+lang**: Create `prompts/langs/<agent>.<lang>.md`, add to `AGENT_LANGUAGE_PROMPTS`
+- **To add language**: Create `prompts/langs/<lang>.md`, add to `LANGUAGE_PROMPTS`
+- **To add agent+lang**: Create `prompts/langs/<agent>.<lang>.md`, add to `AGENT_LANGUAGE_PROMPTS`
 
 ### MockProvider for Testing
 - `crates/g3-providers/src/mock.rs`
@@ -153,23 +168,19 @@ Auto-detects languages and injects toolchain guidance.
   - `MockResponse` [35..200] - configurable chunks and usage
   - `scenarios` module [410..480] - `text_only_response()`, `multi_turn()`, `tool_then_response()`
 - `crates/g3-core/tests/mock_provider_integration_test.rs` - integration tests
-
-**Usage**: `MockProvider::new().with_response(MockResponse::text("Hello!"))`
+- **Usage**: `MockProvider::new().with_response(MockResponse::text("Hello!"))`
 
 ### G3 Status Message Formatting
 - `crates/g3-cli/src/g3_status.rs`
-  - `Status` [12] - enum: Done, Failed, Error(String), Custom(String), Resolved, Insufficient, NoChanges
+  - `Status` [12] - enum: Done, Failed, Error, Custom, Resolved, Insufficient, NoChanges
   - `G3Status` [44] - static methods for "g3:" prefixed messages
-  - `progress()` [48] - "g3: <msg> ..." (no newline)
-  - `done()` [72] - bold green "[done]"
-  - `failed()` [81] - red "[failed]"
-  - `thin_result()` [236] - formats ThinResult with colors
+  - `progress()` [48], `done()` [72], `failed()` [81], `thin_result()` [236]
 
 ### Prompt Cache Statistics
-- `crates/g3-providers/src/lib.rs` [195..210] - `Usage.cache_creation_tokens`, `cache_read_tokens`
-- `crates/g3-providers/src/anthropic.rs` [944..956] - parses `cache_creation_input_tokens`, `cache_read_input_tokens`
-- `crates/g3-providers/src/openai.rs` [494..510] - parses `prompt_tokens_details.cached_tokens`
-- `crates/g3-core/src/lib.rs` [75..90] - `CacheStats` struct; [106] - `Agent.cache_stats`
+- `crates/g3-providers/src/lib.rs` - `Usage.cache_creation_tokens` [6780], `cache_read_tokens` [6929]
+- `crates/g3-providers/src/anthropic.rs` - parses `cache_creation_input_tokens`, `cache_read_input_tokens`
+- `crates/g3-providers/src/openai.rs` - parses `prompt_tokens_details.cached_tokens`
+- `crates/g3-core/src/lib.rs` - `CacheStats` [3066]; `Agent.cache_stats`
 - `crates/g3-core/src/stats.rs` [189..230] - `format_cache_stats()` with hit rate metrics
 
 ### Embedded Provider (Local LLM)
@@ -212,25 +223,21 @@ gpu_layers = 99
 ### Agent Skills System
 Portable skill packages with SKILL.md + optional scripts per Agent Skills spec (agentskills.io).
 
-- `crates/g3-core/src/skills/mod.rs` [0..47] - exports: `Skill`, `discover_skills`, `generate_skills_prompt`
-- `crates/g3-core/src/skills/parser.rs` [0..363]
-  - `Skill` [11..30] - name, description, metadata, body, path
-  - `Skill::parse()` [45..100] - parses SKILL.md with YAML frontmatter
-  - `validate_name()` [133..175] - 1-64 chars, lowercase+hyphens
-- `crates/g3-core/src/skills/discovery.rs` [0..383]
-  - `discover_skills()` [38..85] - scans 5 locations: embedded → global → extra → workspace → repo
-  - `load_embedded_skills()` [88..102] - synthetic path `<embedded:name>/SKILL.md`
-  - `is_embedded_skill()` [161..163] - checks `<embedded:` prefix
-- `crates/g3-core/src/skills/embedded.rs` [0..55]
-  - `EmbeddedSkill` [15..20] - name, skill_md
-  - `EMBEDDED_SKILLS` [27] - static array (currently empty)
-- `crates/g3-core/src/skills/extraction.rs` [0..234]
-  - `extract_script()` [28..85] - extracts to `.g3/bin/`, tracks version hash
-  - `needs_update()` [107..118] - compares stored hash vs content
-- `crates/g3-core/src/skills/prompt.rs` [0..140]
-  - `generate_skills_prompt()` [12..40] - generates `<available_skills>` XML
+- `crates/g3-core/src/skills/mod.rs` [0..1501] - exports: `Skill`, `discover_skills`, `generate_skills_prompt`
+- `crates/g3-core/src/skills/parser.rs` [0..10750]
+  - `Skill` [389] - name, description, metadata, body, path
+  - `Skill::parse()` [1632] - parses SKILL.md with YAML frontmatter
+  - `validate_name()` [4970] - 1-64 chars, lowercase+hyphens
+- `crates/g3-core/src/skills/discovery.rs` [0..12921]
+  - `discover_skills()` [1266] - scans 5 locations: embedded → global → extra → workspace → repo
+  - `load_embedded_skills()` [3263] - synthetic path `<embedded:name>/SKILL.md`
+- `crates/g3-core/src/skills/embedded.rs` [0..1674]
+  - `EmbeddedSkill` [574] - name, skill_md
+  - `EMBEDDED_SKILLS` [944] - static array (currently empty)
+- `crates/g3-core/src/skills/prompt.rs` [0..5628]
+  - `generate_skills_prompt()` [397] - generates `<available_skills>` XML
 - `crates/g3-config/src/lib.rs` [180..200] - `SkillsConfig` (enabled, extra_paths)
-- `crates/g3-cli/src/project_files.rs` [180..210] - `discover_and_format_skills()`
+- `crates/g3-cli/src/project_files.rs` - `discover_and_format_skills()`
 
 **Skill Locations** (priority: later overrides earlier):
 1. Embedded (compiled in)
@@ -251,220 +258,133 @@ compatibility: Requires X # Optional
 ```
 
 ### Research Tool (First-Class)
-Async web research via background scout agent. Implemented as a first-class tool (not a skill).
+Async web research via background scout agent.
 
-- `crates/g3-core/src/pending_research.rs` [0..547]
-  - `PendingResearchManager` - thread-safe task tracking with Arc<RwLock>
-  - `ResearchTask`, `ResearchStatus` - task state (Pending/Complete/Failed)
-  - `register()`, `complete()`, `fail()`, `get()`, `list_pending()`, `take_completed()`
-  - `with_notifications()` - broadcast channel for interactive mode
-- `crates/g3-core/src/tools/research.rs` [0..471]
-  - `execute_research()` - spawns scout agent in background tokio task
-  - `execute_research_status()` - check status of pending/completed research
-  - `CONTEXT_ERROR_PATTERNS` - detects context window exhaustion
-  - `strip_ansi_codes()`, `extract_report()` - report extraction utilities
+- `crates/g3-core/src/pending_research.rs` [0..18348]
+  - `ResearchStatus` [682] - Pending/Complete/Failed
+  - `ResearchTask` [1273] - task state
+  - `PendingResearchManager` [2906] - thread-safe tracking with Arc<RwLock>
+  - `with_notifications()` [3749] - broadcast channel for interactive mode
+  - `register()` [5069], `complete()` [5480], `fail()` [6419], `get()` [7344], `list_pending()` [7806], `take_completed()` [8952]
+- `crates/g3-core/src/tools/research.rs` [0..17060]
+  - `CONTEXT_ERROR_PATTERNS` [929] - detects context window exhaustion
+  - `execute_research()` [1644] - spawns scout agent in background tokio task
+  - `execute_research_status()` [7540] - check pending/completed
+  - `extract_report()` [10694], `strip_ansi_codes()` [13148]
 - `crates/g3-core/src/lib.rs`
-  - `Agent.pending_research_manager` - field on Agent struct
-  - `inject_completed_research()` [781..836] - injects results as user messages
-  - `enable_research_notifications()` - for interactive mode
-
-**Tools**: `research` (async, returns research_id), `research_status` (check pending tasks)
+  - `inject_completed_research()` [31375] - injects results as user messages
+  - `enable_research_notifications()` [33459] - for interactive mode
+- **Tools**: `research` (async, returns research_id), `research_status` (check pending)
 
 ### Plan Mode
-Structured task planning with cognitive forcing - requires happy/negative/boundary checks.
+Structured task planning with cognitive forcing — requires happy/negative/boundary checks.
 
-- `crates/g3-core/src/tools/plan.rs`
-  - `Plan` [200..240] - plan_id, revision, approved_revision, items[]
-  - `PlanItem` [110..145] - id, description, state, touches, checks, evidence, notes
-  - `PlanState` [25..45] - enum: Todo, Doing, Done, Blocked
-  - `Checks` [90..105] - happy, negative[], boundary[]
-  - `get_plan_path()` [280..285] - `.g3/sessions/<id>/plan.g3.md`
-  - `read_plan()`, `write_plan()` [290..335] - YAML in markdown
-  - `plan_verify()` [659..700] - verifies evidence when complete
-  - `execute_plan_read/write/approve()` [395..530] - tool implementations
+- `crates/g3-core/src/tools/plan.rs` [0..49798]
+  - `PlanState` [1044] - enum: Todo, Doing, Done, Blocked
+  - `Checks` [2823] - happy, negative[], boundary[]
+  - `PlanItem` [4021] - id, description, state, touches, checks, evidence, notes
+  - `Plan` [6498] - plan_id, revision, approved_revision, items[]
+  - `EvidenceType` [9578] - CodeLocation, TestReference, Unknown
+  - `VerificationStatus` [10133] - Verified, Warning, Error, Skipped
+  - `parse_evidence()` [12712] - parses `file:line-line` or `file::test_name`
+  - `verify_code_location()` [14888] - checks file exists, lines in range
+  - `verify_test_reference()` [16733] - checks test file, searches for fn
+  - `get_plan_path()` [18655] - `.g3/sessions/<id>/plan.g3.md`
+  - `read_plan()` [18818], `write_plan()` [19277] - YAML in markdown
+  - `plan_verify()` [21978] - verifies evidence when complete; checks envelope existence
+  - `format_verification_results()` [23395] - takes `working_dir: Option<&Path>` as third param
+  - `execute_plan_read()` [25881], `execute_plan_write()` [27233], `execute_plan_approve()` [30651]
 - `crates/g3-core/src/tool_definitions.rs` [263..330] - plan_read, plan_write, plan_approve
 - `crates/g3-core/src/prompts.rs` [21..130] - SHARED_PLAN_SECTION
-
-**Tool names**: `plan_read`, `plan_write`, `plan_approve` (underscores, not dots)
-
-### Plan Verification System
-- `crates/g3-core/src/tools/plan.rs`
-  - `EvidenceType` [283..300] - CodeLocation, TestReference, Unknown
-  - `VerificationStatus` [303..320] - Verified, Warning, Error, Skipped
-  - `parse_evidence()` [390..428] - parses `file:line-line` or `file::test_name`
-  - `verify_code_location()` [443..495] - checks file exists, lines in range
-  - `verify_test_reference()` [496..554] - checks test file, searches for fn
-
-**Evidence formats**: `src/foo.rs:42-118`, `src/foo.rs:42`, `tests/foo.rs::test_bar`
+- **Tool names**: `plan_read`, `plan_write`, `plan_approve` (underscores, not dots)
+- **Evidence formats**: `src/foo.rs:42-118`, `src/foo.rs:42`, `tests/foo.rs::test_bar`
 
 ### Invariants System (Rulespec & Envelope)
-Machine-readable invariants for Plan Mode verification.
+Machine-readable invariants for Plan Mode verification. Rulespec read from `analysis/rulespec.yaml` (checked-in).
 
-- `crates/g3-core/src/tools/invariants.rs`
-  - `Claim` [50..75] - name + selector
-  - `PredicateRule` [80..120] - Contains, Equals, Exists, NotExists, GreaterThan, LessThan, MinLength, MaxLength, Matches
-  - `Predicate` [125..180] - claim, rule, value, source, notes
-  - `Rulespec` [185..240] - claims[] + predicates[]
-  - `ActionEnvelope` [245..290] - facts HashMap
-  - `Selector` [295..410] - XPath-like: `foo.bar`, `foo[0]`, `foo[*]`
-  - `evaluate_rulespec()` [780..850] - evaluates against envelope
-  - Paths: `.g3/sessions/<id>/rulespec.yaml`, `envelope.yaml`
+- `crates/g3-core/src/tools/invariants.rs` [0..73975]
+  - `Claim` [2024] - name + selector
+  - `PredicateRule` [3009] - Contains, Equals, Exists, NotExists, GreaterThan, LessThan, MinLength, MaxLength, Matches
+  - `Predicate` [5617] - claim, rule, value, source, notes
+  - `Rulespec` [8734] - claims[] + predicates[]
+  - `ActionEnvelope` [11203] - facts HashMap
+  - `Selector` [12900] - XPath-like: `foo.bar`, `foo[0]`, `foo[*]`
+  - `read_rulespec()` [29472] - takes `&Path` (working_dir)
+  - `evaluate_rulespec()` [32056] - evaluates against envelope
+
+### Write Envelope Tool
+- `crates/g3-core/src/tools/envelope.rs` [0..23347]
+  - `execute_write_envelope()` [8764] - parses YAML facts, writes envelope.yaml, calls verify_envelope()
+  - `verify_envelope()` [11705] - compiles rulespec on-the-fly, extracts facts, runs datalog, writes `.dl` + `datalog_evaluation.txt` (shadow mode)
+- `crates/g3-core/src/tool_definitions.rs` [266..282] - write_envelope tool definition
+- `crates/g3-core/src/tool_dispatch.rs` - write_envelope dispatch case
+- **Workflow**: `write_envelope` → `verify_envelope()` → datalog shadow, then `plan_write(done)` → `plan_verify()` → checks envelope exists
+
+### Datalog Invariant Verification
+- `crates/g3-core/src/tools/datalog.rs` [0..80172]
+  - `CompiledPredicate` [1681] - id, claim_name, selector, rule, expected_value, source, notes
+  - `CompiledRulespec` [2728] - plan_id, compiled_at_revision, predicates, claims
+  - `compile_rulespec()` [3588] - validates selectors, builds claim lookup
+  - `Fact` [6741] - claim_name, value
+  - `extract_facts()` [7057] - uses Selector to navigate envelope YAML; fallback wraps in `facts:` if selector has `facts.` prefix
+  - `extract_values_recursive()` [8478] - handles arrays/objects/scalars, adds __length facts
+  - `DatalogPredicateResult` [10308], `DatalogExecutionResult` [10862]
+  - `execute_rules()` [11627] - builds fact lookup, uses datafrog Iteration; when conditions delegate to `evaluate_predicate_datalog()`
+  - `evaluate_predicate_datalog()` [14872] - handles all 9 PredicateRule types
+  - `escape_datalog_string()` [23990], `format_datalog_program()` [24582] - Soufflé-style .dl output
+  - `format_datalog_results()` [31136] - formats for shadow mode display
+- **Relations**: `claim_value(claim, value)`, `claim_length(claim, length)`, `predicate_pass(id)`, `predicate_fail(id)`
+
+### Solon Agent (Rulespec Authoring)
+- `agents/solon.md` - interactive rulespec authoring agent prompt
+- `crates/g3-cli/src/embedded_agents.rs` [551] - 9 embedded agents: breaker, carmack, euler, fowler, hopper, huffman, lamport, scout, solon
+- **Usage**: `g3 --agent solon`
+
+### Structured Tool Call Messages
+Native tool calls stored as structured `MessageToolCall` objects, not inline JSON text.
+
+- `crates/g3-providers/src/lib.rs` [0..17486]
+  - `MessageToolCall` [2894] - id, name, input
+  - `Message` [3014] - `tool_calls: Vec<MessageToolCall>`, `tool_result_id: Option<String>`
+- `crates/g3-providers/src/anthropic.rs` [0..74631]
+  - `convert_messages()` [8642] - emits `tool_use`/`tool_result` blocks for structured tool calls
+  - `strip_orphaned_tool_use()` [14737] - defense-in-depth: strips orphaned `tool_use` blocks with no matching `tool_result`
+  - `ToolResultContent` [46268] - enum (Text | Blocks) for structured content
+  - `ToolResultBlock` [46650] - enum (Image, Text) inside tool_result; images from read_image nested here, not as top-level blocks
+- `crates/g3-core/src/lib.rs` - `ToolCall.id` [2516] field from native providers
+- `crates/g3-core/src/streaming_parser.rs` [0..29244] - `process_chunk()` [10449] preserves tool call `id`
+- **Gotcha**: Images in tool result messages must be nested inside `tool_result.content` array, not as top-level `Image` blocks (Anthropic API rejects mixed top-level Image+ToolResult)
+
+### Tool Call Token Tracking
+- `crates/g3-core/src/context_window.rs` - `estimate_message_tokens()` [7695] accounts for `tool_calls[].input`
+- Token formula: content_tokens + per-tool (input_chars/3 * 1.1 + 20 overhead)
+- **Gotcha**: Without this, tool input JSON is invisible to tracker → compaction never triggers → API 400
 
 ### Studio SDLC Pipeline
 Orchestrates 7 agents in sequence for codebase maintenance.
 
 - `crates/studio/src/sdlc.rs`
   - `PIPELINE_STAGES` [28..62] - euler → breaker → hopper → fowler → carmack → lamport → huffman
-  - `Stage` [18..26] - name, description, focus
-  - `StageStatus` [65..80] - Pending, Running, Complete, Failed, Skipped
+  - `Stage` [18..26], `StageStatus` [65..80] - Pending, Running, Complete, Failed, Skipped
   - `PipelineState` [108..140] - run_id, stages[], commit_cursor, session_id
   - `display_pipeline()` [354..390] - box display with status icons
 - `crates/studio/src/main.rs`
   - `cmd_sdlc_run()` [540..655] - orchestrates pipeline, merges on completion
   - `has_commits_on_branch()` [715..728] - counts commits ahead of main
 - `crates/studio/src/git.rs` - `merge_to_main()` (hardcodes 'main')
-
-**State**: `.g3/sdlc/pipeline.json`
-**CLI**: `studio sdlc run [-c N]`, `studio sdlc status`, `studio sdlc reset`
+- **State**: `.g3/sdlc/pipeline.json`
+- **CLI**: `studio sdlc run [-c N]`, `studio sdlc status`, `studio sdlc reset`
 
 ### Terminal Width Responsive Output
-Makes tool output responsive to terminal width - no line wrapping, with 4-char right margin.
+Tool output responsive to terminal width — no line wrapping, 4-char right margin.
 
 - `crates/g3-cli/src/terminal_width.rs`
-  - `get_terminal_width()` [21..28] - returns usable width (terminal - 4 margin), min 40, default 80
-  - `clip_line()` [33..44] - clips line with "…" ellipsis, UTF-8 safe
-  - `compress_path()` [53..96] - preserves filename, truncates dirs from left with "…"
-  - `compress_command()` [101..103] - clips command from right with "…"
-  - `available_width_after_prefix()` [115..117] - helper for prefixed lines
+  - `get_terminal_width()` [21..28] - usable width (terminal - 4), min 40, default 80
+  - `clip_line()` [33..44] - clips with "…", UTF-8 safe
+  - `compress_path()` [53..96] - preserves filename, truncates dirs from left
+  - `compress_command()` [101..103] - clips from right
+  - `available_width_after_prefix()` [115..117]
 - `crates/g3-cli/src/ui_writer_impl.rs`
-  - `update_tool_output_line()` [407..445] - uses clip_line() with dynamic width
-  - `print_tool_output_line()` [447..454] - uses clip_line() for output lines
   - `print_tool_output_header()` [293..410] - uses compress_path/compress_command
-  - `print_tool_compact()` [475..635] - width-aware compact tool display
-
-### Datalog Invariant Verification
-- `crates/g3-core/src/tools/datalog.rs` [0..37000]
-  - `CompiledPredicate` [47..67] - id, claim_name, selector, rule, expected_value, source, notes
-  - `CompiledRulespec` [70..80] - plan_id, compiled_at_revision, predicates, claims
-  - `compile_rulespec()` [88..140] - validates selectors, builds claim lookup, converts to CompiledPredicate
-  - `Fact` [170..180] - claim_name, value (extracted from envelope)
-  - `extract_facts()` [190..210] - uses Selector to navigate envelope YAML
-  - `extract_values_recursive()` [215..250] - handles arrays/objects/scalars, adds __length facts
-  - `DatalogPredicateResult` [255..275] - id, claim_name, rule, expected_value, passed, reason, source, notes
-  - `DatalogExecutionResult` [280..295] - predicate_results, fact_count, passed_count, failed_count
-  - `execute_rules()` [300..340] - builds fact lookup, uses datafrog Iteration, evaluates predicates
-  - `evaluate_predicate_datalog()` [345..480] - handles all PredicateRule types
-  - `get_compiled_rulespec_path()` [500..505] - `.g3/sessions/<id>/rulespec.compiled.json`
-  - `save_compiled_rulespec()`, `load_compiled_rulespec()` [510..530] - JSON serialization
-  - `format_datalog_results()` [540..620] - formats results for shadow mode display
-- `crates/g3-core/src/tools/plan.rs`
-  - `shadow_datalog_verify()` [716..760] - loads compiled rulespec + envelope, runs datalog, prints to stderr
-  - `execute_plan_approve()` [1030..1095] - compiles rulespec on approval, saves to rulespec.compiled.json
-
-**Datalog Flow**:
-1. `plan_approve` → `compile_rulespec()` → saves `rulespec.compiled.json`
-2. `plan_verify` → `shadow_datalog_verify()` → loads compiled + envelope → `extract_facts()` → `execute_rules()` → `eprint!()` (shadow mode)
-
-### Rulespec Changes (2026-02-06)
-- Rulespec is no longer generated on-the-fly during `plan_write` — it's now read from `analysis/rulespec.yaml` (checked-in, hand-crafted)
-- `read_rulespec()` in `invariants.rs` now takes `&Path` (working_dir) instead of `&str` (session_id)
-- `write_rulespec()`, `get_rulespec_path()`, `format_rulespec_yaml()`, `format_rulespec_markdown()` removed from `invariants.rs`
-- `save_compiled_rulespec()`, `load_compiled_rulespec()`, `get_compiled_rulespec_path()` removed from `datalog.rs`
-- `shadow_datalog_verify()` now compiles rulespec on-the-fly at verify time, writes `rulespec.compiled.dl` and `datalog_evaluation.txt` to session dir
-- `plan_write` tool no longer accepts `rulespec` parameter
-- `plan_approve` no longer compiles rulespec
-- `format_verification_results()` now takes `working_dir: Option<&Path>` as third parameter
-
-### Write Envelope Tool
-- `crates/g3-core/src/tools/envelope.rs` [0..184]
-  - `execute_write_envelope()` [37..79] - parses YAML facts, writes envelope.yaml, calls verify_envelope()
-  - `verify_envelope()` [93..183] - compiles rulespec, extracts facts, runs datalog, writes .dl + evaluation artifacts (shadow mode)
-- `crates/g3-core/src/tools/mod.rs` [16] - `pub mod envelope;`
-- `crates/g3-core/src/tool_definitions.rs` [266..282] - write_envelope tool definition (facts parameter)
-- `crates/g3-core/src/tool_dispatch.rs` [41..43] - write_envelope dispatch case
-- `prompts/system/native.md` [78..100] - Action Envelope section references write_envelope tool
-- Tool count: 14 (was 13)
-
-**Workflow change**: `write_envelope` → `verify_envelope()` → datalog shadow, then `plan_write(done)` → `plan_verify()` → checks envelope exists
-- `shadow_datalog_verify()` removed from `plan.rs`
-- `format_verification_results()` no longer runs datalog, only checks envelope existence
-
-### Datalog Program Generation
-- `crates/g3-core/src/tools/datalog.rs` [537..701] - `format_datalog_program()`, `escape_datalog_string()`
-  - Soufflé-style .dl output with `.decl` relations, fact assertions, and rules
-  - Relations: `claim_value(claim, value)`, `claim_length(claim, length)`, `predicate_pass(id)`, `predicate_fail(id)`
-  - Handles all 9 PredicateRule types: Exists, NotExists, Equals, Contains, GreaterThan, LessThan, MinLength, MaxLength, Matches
-  - Length facts (`__length` suffix) go into `claim_length` relation
-- `crates/g3-core/src/tools/envelope.rs` [150] - `verify_envelope()` now calls `format_datalog_program()` instead of `serde_yaml::to_string()`
-- **Bug fixed**: `.dl` files previously contained YAML (just serialized CompiledRulespec), now contain actual Soufflé datalog
-
-### Datalog Program Generation
-- `crates/g3-core/src/tools/datalog.rs` [537..701] - `format_datalog_program()`, `escape_datalog_string()`
-  - Soufflé-style .dl output with `.decl` relations, fact assertions, and rules
-  - Relations: `claim_value(claim, value)`, `claim_length(claim, length)`, `predicate_pass(id)`, `predicate_fail(id)`
-  - Handles all 9 PredicateRule types: Exists, NotExists, Equals, Contains, GreaterThan, LessThan, MinLength, MaxLength, Matches
-  - Length facts (`__length` suffix) go into `claim_length` relation
-- `crates/g3-core/src/tools/envelope.rs` [150] - `verify_envelope()` now calls `format_datalog_program()` instead of `serde_yaml::to_string()`
-- **Bug fixed**: `.dl` files previously contained YAML (just serialized CompiledRulespec), now contain actual Soufflé datalog
-
-### Datalog Fact Extraction Fix (2026-02-07)
-- `crates/g3-core/src/tools/datalog.rs` [188..207] - `extract_facts()` now has fallback: if selector returns empty on unwrapped envelope value, retries against a `facts`-wrapped version. This handles rulespec selectors written as `facts.feature.done` when `to_yaml_value()` strips the `facts:` wrapper.
-- Root cause: `ActionEnvelope.to_yaml_value()` creates a Mapping from the `facts` HashMap WITHOUT a `facts` key wrapper, but rulespec selectors may include a `facts.` prefix.
-- New unit tests: `test_extract_facts_with_facts_prefix_selector`, `test_extract_facts_roundtrip_from_yaml`, `test_execute_rules_full_pipeline_with_facts_prefix`, `test_execute_rules_full_pipeline_without_facts_prefix`
-- New integration tests: `test_plan_verify_rulespec_with_facts_prefix_selectors`, `test_plan_verify_mixed_pass_fail`
-- Strengthened: `test_plan_verify_with_analysis_rulespec` now asserts `Facts extracted: 0` is NOT in output
-
-### Solon Agent (Rulespec Authoring)
-- `agents/solon.md` [0..10800] - Interactive rulespec authoring agent prompt
-  - Full reference for all 9 PredicateRule types: exists, not_exists, equals, contains, greater_than, less_than, min_length, max_length, matches
-  - Selector syntax (dot/index/wildcard), envelope format, verification pipeline
-  - Mandatory write_envelope validation step, common mistakes section
-- `crates/g3-cli/src/embedded_agents.rs` [26] - solon registered in EMBEDDED_AGENTS
-- `crates/g3-cli/src/agent_mode.rs` [42] - solon in available agents error message
-- **Usage**: `g3 --agent solon` for interactive rulespec authoring
-- **Agent count**: 9 embedded agents (was 8)
-
-### When Condition Bugfix (2026-02-07)
-- `crates/g3-core/src/tools/datalog.rs` [377..395] - `execute_rules()` when condition evaluation
-- **Bug**: The `_ =>` catch-all in when condition evaluation did naive string `contains` check. For `Matches` (regex like `^Re: `), it checked if fact values literally contained the regex pattern string — which never matched. Result: when conditions with `matches` rule always evaluated as not-met → vacuous pass → violations slipped through.
-- **Fix**: Replaced hand-rolled when evaluation with synthetic `CompiledPredicate` delegation to `evaluate_predicate_datalog()`, which handles all 12 rule types correctly.
-- **Tests**: `test_execute_rules_when_matches_condition_met`, `test_execute_rules_when_matches_condition_met_but_predicate_fails`, `test_execute_rules_when_matches_condition_not_met`
-- **Note**: The `invariants.rs` path was NOT affected — it already delegated to `evaluate_predicate()` which handles all rules.
-
-### Structured Tool Call Messages (2026-02-11)
-- `crates/g3-providers/src/lib.rs` [102..106] - `MessageToolCall` struct (id, name, input)
-- `crates/g3-providers/src/lib.rs` [124..131] - `Message.tool_calls: Vec<MessageToolCall>`, `Message.tool_result_id: Option<String>`
-- `crates/g3-providers/src/anthropic.rs` [284..340] - `convert_messages()` emits `tool_use` blocks for assistant messages with `tool_calls`, `tool_result` blocks for user messages with `tool_result_id`
-- `crates/g3-providers/src/anthropic.rs` [935..941] - `AnthropicContent::ToolResult` variant added
-- `crates/g3-core/src/lib.rs` [82..88] - `ToolCall.id` field added (from native providers)
-- `crates/g3-core/src/lib.rs` [2530..2545] - Tool messages store structured `tool_calls` instead of inline JSON text
-- `crates/g3-core/src/lib.rs` [1385..1400] - `check_duplicate_in_previous_message()` checks structured `tool_calls` field
-- `crates/g3-core/src/context_window.rs` [107..109] - `add_message_with_tokens()` preserves messages with `tool_calls` even if content is empty
-- `crates/g3-core/src/streaming_parser.rs` [339] - `process_chunk()` preserves tool call `id` from provider
-
-**Bug fixed**: Agent would stop mid-task because native tool calls were stored as inline JSON text in `Message.content`. When sent back to Anthropic API via `convert_messages()`, they went as plain text instead of structured `tool_use`/`tool_result` blocks. The model would occasionally get confused and emit text describing what it wanted to do instead of invoking the tool mechanism.
-
-### Compaction Tool Call Stripping Fix (2026-02-11)
-- `crates/g3-core/src/context_window.rs` [339..355] - `extract_preserved_messages()` now strips `tool_calls` from preserved last assistant message
-  - **Root cause**: After compaction, preserved assistant message retained structured `tool_calls` but the corresponding `tool_result` was summarized away → orphaned `tool_use` blocks → Anthropic 400 error
-  - **Fix**: Clear `msg.tool_calls` in `extract_preserved_messages()` before returning
-  - Messages with only tool_calls and empty content are dropped by `add_message_with_tokens()` empty check
-- `crates/g3-providers/src/anthropic.rs` [369..435] - `strip_orphaned_tool_use()` defense-in-depth
-  - Post-processing pass in `convert_messages()` detects orphaned `tool_use` blocks (no matching `tool_result` in next message)
-  - Strips orphaned blocks with warning, adds placeholder text if message becomes empty
-- Tests: `test_compaction_strips_tool_calls_from_last_assistant`, `test_compaction_drops_assistant_with_only_tool_calls_no_text`, `test_compaction_preserves_normal_assistant_message` (unit), `test_strip_orphaned_tool_use_*` (anthropic), `test_compaction_strips_structured_tool_calls` (integration)
-
-### Tool Call Token Tracking Fix (2026-02-11)
-- `crates/g3-core/src/context_window.rs` [199..220] - `estimate_message_tokens()` accounts for both `message.content` and `message.tool_calls[].input`
-- **Root cause**: `estimate_tokens()` only counted `message.content` chars, ignoring `tool_calls[].input` JSON. When sent to API, `tool_use` blocks include full input, causing massive undercount.
-- **Impact**: In a real session, 303k chars of tool input (101k tokens) were invisible to the tracker. Context showed 39% but actual was >100%. Compaction never triggered → API 400 error.
-- **Fix**: Added `estimate_message_tokens(message)` that sums content tokens + per-tool-call input tokens (chars/3 * 1.1 + 20 overhead). Updated `add_message_with_tokens()`, `recalculate_tokens()`, `clear_conversation()` to use it.
-- **Tests**: 7 unit tests in `context_window.rs`, 1 integration test in `mock_provider_integration_test.rs::test_tool_call_input_tokens_tracked_in_context_window`
-
-### Anthropic ToolResult Structured Content (2026-02-12)
-- `crates/g3-providers/src/anthropic.rs` [1058..1110] - `ToolResultContent` enum (Text | Blocks) with custom Serialize/Deserialize
-- `crates/g3-providers/src/anthropic.rs` [1078..1086] - `ToolResultBlock` enum (Image, Text) for structured content inside tool_result
-- `crates/g3-providers/src/anthropic.rs` [283..330] - `convert_messages()` User branch: images from read_image nested inside ToolResult content array, not as top-level Image blocks
-- **Root cause**: Anthropic API rejects top-level `Image` blocks mixed with `ToolResult` blocks in the same user message. Images must be inside `tool_result.content` array.
-- **Bug pattern**: `read_image` → images attached to tool result message → `convert_messages()` put images as top-level blocks → API 400 "tool_use ids without tool_result"
-- Tests: `test_tool_result_with_images_nested_inside`, `test_tool_result_without_images_uses_string_content`, `test_regular_user_message_with_images_uses_top_level_blocks`, `test_strip_orphaned_tool_use_works_with_structured_tool_result`
+  - `update_tool_output_line()` [407..445], `print_tool_output_line()` [447..454] - clip_line()
+  - `print_tool_compact()` [475..635] - width-aware compact display