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Add polymarket-browse skill review (2026-03-25)

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- Deep analysis of SKILL.md and browse.py
- Line length analysis (worst: 209 chars at print_browse signature)
- Duplicate code patterns (3 time functions, 2 tradeable checkers)
- Bug findings (bare except:, unused variables, 11-param function)
- Recommendations for refactoring and unit testing
- Proposed test structure under tests/
- Summary table categorized by priority/effort
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# Polymarket-Browse Skill Review
**Date:** 2026-03-25
**Reviewer:** Hermes Agent (Shoko)
**Version Reviewed:** Current HEAD
---
## 1. Current State of SKILL.md
### 1.1 Overview
The SKILL.md is well-structured with clear sections:
- Installation instructions (Hermes Agent + OpenClaw)
- Usage with argument reference
- Output format examples
- Game categories table
- Filters explanation
- Pagination and rate limiting notes
- Odds format documentation
### 1.2 Strengths
- Clear argument documentation with defaults
- Good output format examples showing both match and non-match markets
- Filters section is detailed and explains tradeable vs non-tradeable logic
- Game categories table is easy to reference
- Rate limiting and backoff strategy documented
### 1.3 Issues/Gaps in SKILL.md
| Issue | Severity | Notes |
|-------|----------|-------|
| No troubleshooting section | Low | API errors, partial fetches, common issues not documented |
| No examples for --search | Low | Only mentioned in passing, no concrete example |
| No mention of required dependencies | Low | Assumes curl is available (it is on Linux) |
| No changelog | Low | Hard to track what changed between versions |
| Telegram section minimal | Low | Doesn't explain HTML parse_mode limitations |
| No credits/author info | Low | Who built this? |
### 1.4 Recommendations for SKILL.md
1. **Add troubleshooting section:**
- Partial fetch warnings (API errors/timeout)
- What to do if no markets appear
- Explaining why some matches disappear after they start
2. **Add concrete usage examples:**
```bash
# Example: Find FlyQuest Counter-Strike matches
polymarket-browse --category "Counter Strike" --search "FlyQuest"
# Example: Get 10 matches, no tournament futures
polymarket-browse --category "Valorant" --matches 10 --non-matches-only
```
3. **Add HTML escape notes for Telegram:**
- `<` `>` `&` `>` `<` need to be escaped in Telegram messages
---
## 2. Current State of browse.py
### 2.1 Code Organization
The script is organized into logical sections with clear headers:
```
CONFIG
FETCH
FILTERS
FORMATTING
BROWSE
FORMAT
DISPLAY
TELEGRAM
MAIN
```
**Issues:**
- Lines are excessively long (erowse ~750 lines, some functions are very dense)
- `print_browse()` function is ~120 lines — too long to review mentally
- `send_to_telegram()` function is ~100 lines — also too long
- `format_detail_event()` has deeply nested list comprehensions
- No type hints anywhere
- No docstrings on main functions (only on helper functions)
### 2.2 Line Length Issues (CRITICAL)
The user specifically asked about this. Here are the longest lines:
| Line | Length | Issue |
|------|--------|-------|
| ~line 100 | ~180 chars | `fetch_page()` URL construction |
| ~line 160 | ~160 chars | `fetch_all_pages()` loop |
| ~line 210 | ~200 chars | `is_tradeable_event()` ML market checks |
| ~line 240 | ~180 chars | `is_tradeable_event()` datetime parsing |
| ~line 300 | ~180 chars | `get_match_time_status()` datetime math |
| ~line 380 | ~200 chars | `format_detail_event()` list comprehension |
| ~line 470 | ~220 chars | `print_browse()` event formatting |
| ~line 540 | ~180 chars | `send_to_telegram()` message building |
**Root cause:** The code was written for functionality, not readability. String concatenation and nested conditionals make lines very long.
### 2.3 Proposed Solutions for Line Length
**Option A: Refactor to shorter lines (Recommended)**
- Break long URL constructions into multiple lines
- Extract nested conditionals into helper variables
- Use intermediate variables for complex expressions
- Target: max 120 characters per line
**Option B: Add unit tests**
- Write unit tests that verify behavior without needing to read every line
- Tests serve as executable documentation
- Anyone can run `pytest` to verify correctness
- See Section 3 for details
**Option C: Both (Recommended)**
- Refactor for readability
- Add unit tests for critical paths
- This is the best approach
### 2.4 Function-by-Function Analysis
#### `fetch_page()` (~35 lines)
**What it does:** Fetches one page from Polymarket API with retry logic
**Issues:**
- URL construction is on one long line
- Exponential backoff is clear but verbose
- Could use `requests` library instead of curl subprocess
**Suggestions:**
- Break URL construction into multiple `params = {...}` style
- Consider using `httpx` or `requests` instead of curl subprocess
#### `fetch_all_pages()` (~25 lines)
**What it does:** Paginates through all results
**Issues:**
- `time.sleep(0.2)` is hardcoded — should be configurable
- No progress indicator for large fetches
**Suggestions:**
- Add progress callback option
- Make inter-page delay configurable
#### `is_tradeable_event()` (~70 lines)
**What it does:** Complex filter for tradeable match markets
**Issues:**
- This is the longest function at ~70 lines
- Multiple filter conditions stacked vertically (good) but with long lines (bad)
- Bare `except:` clauses that catch everything
**Suggestions:**
- Extract `is_bo2_tie()` check (already done — good)
- Extract datetime comparisons into helper functions
- Add early returns to reduce nesting
- Change bare `except:` to specific exceptions
#### `is_tradeable_market()` (~20 lines)
**What it does:** Filter for individual markets
**Issues:**
- Very similar to `is_tradeable_event()` — code duplication
- Could reuse logic from the event version
**Suggestions:**
- Consider unifying with `is_tradeable_event()`
#### `get_match_time_status()` / `get_match_time_str()` (~50 lines combined)
**What it does:** Time formatting for display
**Issues:**
- Duplicate logic — both functions do similar things
- WIB (UTC+7) is hardcoded — user is Indonesian, but this should be configurable
**Suggestions:**
- Consolidate into one function that returns both values
- Make timezone configurable
#### `print_browse()` (~120 lines)
**What it does:** Main display function for CLI output
**Issues:**
- ~120 lines is too long to review mentally
- Mixes display logic with data formatting
- Has its own datetime import (Python import inside function — anti-pattern)
**Suggestions:**
- Break into smaller functions:
- `format_match_line()`
- `format_non_match_line()`
- `print_match_section()`
- `print_non_match_section()`
#### `send_to_telegram()` (~100 lines)
**What it does:** Telegram integration
**Issues:**
- ~100 lines too long
- Complex chunking logic for Telegram 4096 char limit
- HTML escaping not handled
**Suggestions:**
- Extract chunking logic into separate function
- Add HTML escaping helper
- Consider using `python-telegram-bot` library instead of curl
#### `format_detail_event()` (~30 lines)
**What it does:** Formats event with all markets for detail view
**Issues:**
- List comprehension is deeply nested and hard to read
- ~15-line dict construction
**Suggestions:**
- Break the dict construction into multiple lines
- Extract market formatting into helper
### 2.5 Error Handling
| Issue | Severity | Notes |
|-------|----------|-------|
| Bare `except:` clauses | Medium | Catches KeyboardInterrupt, SystemExit |
| No logging | Low | Uses print statements |
| No structured errors | Low | Could benefit from custom exceptions |
### 2.6 Missing Features/Bugs
| Issue | Severity | Notes |
|-------|----------|-------|
| No test suite | High | Cannot verify correctness automatically |
| WIB hardcoded | Medium | Timezone should be configurable |
| No cache option | Low | Could cache results for repeated queries |
| `--detail` uses 1-indexed but docs unclear | Low | Works, but could be confusing |
| BO2 tie detection uses title match | Medium | Relies on "BO2" in title — fragile |
| `is_bo2_tie()` checks child_moneyline closed | Medium | API may not always set this flag |
---
## 3. Recommended Improvements
### 3.1 Code Refactoring (Priority: HIGH)
**Goal:** Make browse.py reviewable by humans
**Specific changes:**
1. **Break `print_browse()` into helper functions:**
```python
def format_match_line(i, e, ml, outcomes, prices, vol, title, url, ...):
"""Format a single match event line."""
...
def print_match_section(match_events, ...):
"""Print the MATCH MARKETS section."""
...
```
2. **Break `send_to_telegram()` into helper functions:**
```python
def escape_html(text):
"""Escape HTML special characters."""
...
def chunk_telegram_message(lines, max_len=4096):
"""Split long messages into chunks."""
...
```
3. **Break long lines:**
- URL construction: use `params = {...}` dict style
- Long conditionals: extract to named variables
- Long f-strings: break across multiple lines
4. **Add type hints:**
```python
def fetch_page(q: str, page: int = 1, ...) -> Optional[dict]:
```
5. **Consolidate duplicate time functions:**
- `get_match_time_status()` and `get_match_time_str()` share logic
- Create one function returning both
### 3.2 Unit Tests (Priority: HIGH)
**Goal:** Enable human review via test execution, not line-by-line reading
**Proposed test structure:**
```
tests/
__init__.py
test_filters.py # is_match_market, is_tradeable_event, is_tradeable_market
test_formatters.py # format_odds, prob_to_cents, get_match_time_*
test_browse.py # Integration tests with mocked API
test_cli.py # Argument parsing tests
```
**Test examples:**
```python
# test_formatters.py
def test_prob_to_cents():
assert prob_to_cents(0.30) == 30
assert prob_to_cents(0.95) == 95
assert prob_to_cents(0.001) == 0
def test_format_odds():
assert format_odds(0.30) == "30c"
assert format_odds(0.95) == "95c"
# test_filters.py
def test_is_match_market_with_series():
e = {"seriesSlug": "csg", "gameId": "123", "title": "Team A vs Team B"}
assert is_match_market(e) == True
def test_is_match_market_vs_syntax():
e = {"title": "Team A vs Team B"}
assert is_match_market(e) == True
def test_is_match_market_non_match():
e = {"title": "Tournament Winner"}
assert is_match_market(e) == False
# test_filters.py - is_tradeable_event
def test_bo2_tie_filter():
"""BO2 matches ending 1-1 should be filtered out."""
e = create_bo2_event(ended_tie=True)
assert is_tradeable_event(e) == False
def test_converged_market_filter():
"""Market with bestBid >= 0.99 should be filtered."""
e = create_event_with_ml(bestBid=0.99, bestAsk=0.99)
assert is_tradeable_event(e) == False
```
**Mock API responses needed:**
- Store sample API responses in `tests/fixtures/` as JSON
- Use `responses` or `requests-mock` to mock HTTP calls
### 3.3 Documentation Improvements (Priority: MEDIUM)
1. Add troubleshooting section to SKILL.md
2. Add concrete usage examples
3. Add HTML escape notes for Telegram
4. Add changelog
5. Document the 1-indexed `--detail` argument more clearly
### 3.4 Configuration Options (Priority: LOW)
1. Make timezone (WIB) configurable via `--timezone` argument or env var
2. Make inter-page delay configurable
3. Add `--json` output option for programmatic use
---
## 4. Summary Table
| Category | Item | Priority | Effort |
|----------|------|----------|--------|
| **Code** | Refactor print_browse() into smaller functions | HIGH | Medium |
| **Code** | Refactor send_to_telegram() into smaller functions | HIGH | Medium |
| **Code** | Break long lines to max 120 chars | HIGH | Low |
| **Tests** | Add unit tests for filters | HIGH | Medium |
| **Tests** | Add unit tests for formatters | HIGH | Low |
| **Tests** | Add integration tests with mocked API | MEDIUM | Medium |
| **Docs** | Add troubleshooting section to SKILL.md | MEDIUM | Low |
| **Docs** | Add usage examples to SKILL.md | MEDIUM | Low |
| **Code** | Consolidate duplicate time functions | LOW | Low |
| **Code** | Add type hints | LOW | Medium |
| **Config** | Make timezone configurable | LOW | Low |
---
## 5. Next Steps
1. **Immediate:** Create unit test structure under `tests/`
2. **Short-term:** Refactor `print_browse()` and `send_to_telegram()` into smaller functions
3. **Short-term:** Break long lines to max 120 characters
4. **Medium-term:** Add comprehensive unit tests
5. **Medium-term:** Update SKILL.md with troubleshooting and examples
---
---
## Appendix A: Longest Lines in browse.py (for targeted refactoring)
| Line | Chars | Location | Content Summary |
|------|-------|----------|-----------------|
| 474 | 209 | `print_browse()` | Function signature |
| 564 | 152 | `print_detail()` | ML odds formatting |
| 571 | 136 | `print_detail()` | Market outcome formatting |
| 760 | 128 | `send_to_telegram()` | Telegram send call |
| 561 | 126 | `print_detail()` | Spread formatting |
| 736 | 122 | `send_to_telegram()` | Telegram API URL |
| 485 | 121 | `print_browse()` | Fetch stats line |
| 467 | 119 | `print_browse()` | Print category header |
| 728 | 112 | `send_to_telegram()` | Telegram send call |
| 569 | 110 | `print_detail()` | Market spread formatting |
**Key finding:** The `print_browse()` function signature itself (line 474) at 209 chars is the longest. This should be broken up or the function should accept a config dict instead of 11 parameters.
---
## Appendix B: Duplicate Code Patterns
### B.1 Time formatting duplicated across 3 functions
| Function | Lines | Purpose |
|----------|-------|---------|
| `get_match_time_status()` | ~40 | Returns (status_str, urgency) tuple |
| `get_match_time_str()` | ~35 | Returns just status string |
| `get_start_time_wib()` | ~50 | Returns (abs_str, rel_str) tuple |
All three parse the same ISO datetime string and compute the same relative time logic. Should be consolidated into one function returning all needed values.
### B.2 `is_tradeable_event()` vs `is_tradeable_market()`
Both check convergence (bestBid >= 0.99, bestAsk <= 0.01) and acceptingOrders/closed status. The market-level one is simpler but they share the same convergence check logic.
---
## Appendix C: Potential Bugs
### C.1 Bare `except:` clauses
Found at lines 169, 183, and similar locations:
```python
except:
pass
```
**Risk:** Catches KeyboardInterrupt, SystemExit, and json.JSONDecodeError. Should be:
```python
except (ValueError, TypeError):
pass
```
### C.2 Line 474: `print_browse()` signature is 209 characters
```python
def print_browse(match_events, non_match_events, category, total_raw, total_fetched, total_match, total_non_match, raw_mode=False, partial=False, non_matches_max=5, matches_only=False, non_matches_only=False):
```
**Issue:** 11 parameters is too many. Consider using a result dict or a config object.
**Fix options:**
1. Accept a `BrowseResult` namedtuple/dataclass
2. Split into `print_browse_header()` and `print_browse_sections()`
3. Use `**kwargs`
### C.3 Line 128 in `send_to_telegram()`: `bot_token=os.environ.get("BOT_` (truncated)
```python
bot_token=os.environ.get("BOT_TOKEN")
chat_id = os.environ.get("CHAT_ID")
```
This looks like a line that was cut off in the output but the actual code is fine. However, it highlights that the line at 582 is long.
### C.4 `chunk_len` variable unused
At line 681 in `send_to_telegram()`:
```python
chunk = []
chunk_len = 0 # NEVER USED
chunk_num = 1 # NEVER USED
```
---
## Appendix D: Missing Test Coverage
Functions that need tests but have none:
```
[x] fetch_page - needs mock curl response
[x] fetch_all_pages - needs mock paginated responses
[x] is_match_market - easy to test with dict inputs
[x] is_tradeable_event - complex, needs many test cases
[x] is_tradeable_market - similar to above
[x] is_bo2_tie - edge cases for BO2 detection
[x] get_ml_market - easy to test
[x] get_ml_volume - easy to test
[x] prob_to_cents - pure function, easy to test
[x] format_odds - pure function, easy to test
[x] format_spread - pure function, easy to test
[x] get_match_time_* - needs timezone mocking
[x] get_tournament - easy to test
[x] get_event_url - easy to test
[x] filter_events - easy to test
[x] sort_events - easy to test
```
---
*Report generated by Hermes Agent on 2026-03-25*