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+# Piker Git Commit Message Style Guide
+
+Learned from analyzing 500 commits from the piker repository.
+
+## Subject Line Rules
+
+### Length
+- Target: ~50 characters (avg: 50.5 chars)
+- Maximum: 67 chars (hard limit, though historical max: 146)
+- Keep concise and descriptive
+
+### Structure
+- Use present tense verbs (Add, Drop, Fix, Move, etc.)
+- 65.6% of commits use backticks for code references
+- 33.0% use colon notation (`module.file:` prefix or `: ` separator)
+
+### Opening Verbs (by frequency)
+Primary verbs to use:
+- **Add** (8.4%) - New features, files, functionality
+- **Drop** (3.2%) - Remove features, dependencies, code
+- **Fix** (2.2%) - Bug fixes, corrections
+- **Use** (2.2%) - Switch to different approach/tool
+- **Port** (2.0%) - Migrate code, adapt from elsewhere
+- **Move** (2.0%) - Relocate code, refactor structure
+- **Always** (1.8%) - Enforce consistent behavior
+- **Factor** (1.6%) - Refactoring, code organization
+- **Bump** (1.6%) - Version/dependency updates
+- **Update** (1.4%) - Modify existing functionality
+- **Adjust** (1.0%) - Fine-tune, tweak behavior
+- **Change** (1.0%) - Modify behavior or structure
+
+Casual/informal verbs (used occasionally):
+- **Woops,** (1.4%) - Fixing mistakes
+- **Lul,** (0.6%) - Humorous corrections
+
+### Code References
+Use backticks heavily for:
+- **Module/package names**: `tractor`, `pikerd`, `polars`, `ruff`
+- **Data types**: `dict`, `float`, `str`, `None`
+- **Classes**: `MktPair`, `Asset`, `Position`, `Account`, `Flume`
+- **Functions**: `dedupe()`, `push()`, `get_client()`, `norm_trade()`
+- **File paths**: `.tsp`, `.fqme`, `brokers.toml`, `conf.toml`
+- **CLI flags**: `--pdb`
+- **Error types**: `NoData`
+- **Tools**: `uv`, `uv sync`, `httpx`, `numpy`
+
+### Colon Usage Patterns
+1. **Module prefix**: `.ib.feed: trim bars frame to start_dt`
+2. **Separator**: `Add support: new feature description`
+
+### Tone
+- Technical but casual (use XD, lol, .., Woops, Lul when appropriate)
+- Direct and concise
+- Question marks rare (1.4%)
+- Exclamation marks rare (1.4%)
+
+## Body Structure
+
+### Body Frequency
+- 56.0% of commits have empty bodies (one-line commits are common)
+- Use body for complex changes requiring explanation
+
+### Bullet Lists
+- Prefer `-` bullets (16.2% of commits)
+- Rarely use `*` bullets (1.6%)
+- Indent continuation lines appropriately
+
+### Section Markers (in order of frequency)
+Use these to organize complex commit bodies:
+
+1. **Also,** (most common, 26 occurrences)
+   - Additional changes, side effects, related updates
+   - Example:
+     ```
+     Main change described in subject.
+
+     Also,
+     - related change 1
+     - related change 2
+     ```
+
+2. **Deats,** (8 occurrences)
+   - Implementation details
+   - Technical specifics
+
+3. **Further,** (4 occurrences)
+   - Additional context or future considerations
+
+4. **Other,** (3 occurrences)
+   - Miscellaneous related changes
+
+5. **Notes,** **TODO,** (rare, 1 each)
+   - Special annotations when needed
+
+### Line Length
+- Body lines: 67 character maximum
+- Break longer lines appropriately
+
+## Language Patterns
+
+### Common Abbreviations (by frequency)
+Use these freely in commit bodies:
+- **msg** (29) - message
+- **mod** (15) - module
+- **vs** (14) - versus
+- **impl** (12) - implementation
+- **deps** (11) - dependencies
+- **var** (6) - variable
+- **ctx** (6) - context
+- **bc** (5) - because
+- **obvi** (4) - obviously
+- **ep** (4) - endpoint
+- **tn** (4) - task name
+- **rn** (3) - right now
+- **sig** (3) - signal/signature
+- **env** (3) - environment
+- **tho** (3) - though
+- **fn** (2) - function
+- **iface** (2) - interface
+- **prolly** (2) - probably
+
+Less common but acceptable:
+- **dne**, **osenv**, **gonna**, **wtf**
+
+### Tone Indicators
+- **..** (77 occurrences) - Ellipsis for trailing thoughts
+- **XD** (17) - Expression of humor/irony
+- **lol** (1) - Rare, use sparingly
+
+### Informal Patterns
+- Casual contractions okay: Don't, won't
+- Lowercase starts acceptable for file prefixes
+- Direct, conversational tone
+
+## Special Patterns
+
+### Module/File Prefixes
+Common in piker commits (33.0% use colons):
+- `.ib.feed: description`
+- `.ui._remote_ctl: description`
+- `.data.tsp: description`
+- `.accounting: description`
+
+### Merge Commits
+- 4.4% of commits (standard git merges)
+- Not a primary pattern to emulate
+
+### External References
+- GitHub links occasionally used (13 total)
+- File:line references not used (0 occurrences)
+- No WIP commits in analyzed set
+
+### Claude-code Footer
+When commits assisted by claude-code (4 instances), include:
+
+```
+(this patch was generated in some part by [`claude-code`][claude-code-gh])
+[claude-code-gh]: https://github.com/anthropics/claude-code
+```
+
+## Piker-Specific Terms
+
+### Core Components
+- `pikerd` - piker daemon
+- `brokerd` - broker daemon
+- `tractor` - actor framework used
+- `.tsp` - time series protocol/module
+- `.fqme` - fully qualified market endpoint
+
+### Data Structures
+- `MktPair` - market pair
+- `Asset` - asset representation
+- `Position` - trading position
+- `Account` - account data
+- `Flume` - data stream
+- `SymbologyCache` - symbol caching
+
+### Common Functions
+- `dedupe()` - deduplication
+- `push()` - data pushing
+- `get_client()` - client retrieval
+- `norm_trade()` - trade normalization
+- `open_trade_ledger()` - ledger opening
+- `markup_gaps()` - gap marking
+- `get_null_segs()` - null segment retrieval
+- `remote_annotate()` - remote annotation
+
+### Brokers & Integrations
+- `binance` - Binance integration
+- `.ib` - Interactive Brokers
+- `bs_mktid` - broker-specific market ID
+- `reqid` - request ID
+
+### Configuration
+- `brokers.toml` - broker configuration
+- `conf.toml` - general configuration
+
+### Development Tools
+- `ruff` - Python linter
+- `uv` / `uv sync` - package manager
+- `--pdb` - debugger flag
+- `pdbp` - debugger
+- `asyncvnc` / `pyvnc` - VNC libraries
+- `httpx` - HTTP client
+- `polars` - dataframe library
+- `rapidfuzz` - fuzzy matching
+- `numpy` - numerical library
+- `trio` - async framework
+- `asyncio` - async framework
+- `xonsh` - shell
+
+## Examples
+
+### Simple one-liner
+```
+Add `MktPair.fqme` property for symbol resolution
+```
+
+### With module prefix
+```
+.ib.feed: trim bars frame to `start_dt`
+```
+
+### Casual fix
+```
+Woops, compare against first-dt in `.ib.feed` bars frame
+```
+
+### With body using "Also,"
+```
+Drop `poetry` for `uv` in dev workflow
+
+Also,
+- update deps in `pyproject.toml`
+- add `uv sync` to CI pipeline
+- remove old `poetry.lock`
+```
+
+### With implementation details
+```
+Factor position tracking into `Position` dataclass
+
+Deats,
+- move calc logic from `brokerd` to `.accounting`
+- add `norm_trade()` helper for broker normalization
+- use `MktPair.fqme` for consistent symbol refs
+```
+
+---
+
+**Analysis date:** 2026-01-27
+**Commits analyzed:** 500 from piker repository
+**Maintained by:** Tyler Goodlet