AlvaroLaraFF/run-race-predictor
.claude/skills/run-race-predictor/SKILL.md
Predict race times for 5k / 10k / half marathon / marathon from the user's recent best efforts. Use when the user asks "for what time am I ready", "race predictor", "when can I run a sub-X".
tools
Updated Apr 16, 2026
$ install --global
skillsauthnpx skillsauth add AlvaroLaraFF/strava-coach run-race-predictorInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
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3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
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Socket.devSupply chain security analysis
50%
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VirusTotalMulti-engine malware detection
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CrowdStrikeAdvanced threat intelligence
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OSV-ScannerOpen Source Vulnerability database check
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OWASP Dep-Check
50%
Last scanned: Apr 16, 2026, 5:39 PM28.0s3 files scanned
SKILL.md
- name:
- run-race-predictor
- description:
- >
- allowed-tools:
- Bash(python3 *), Read
run-race-predictor
Uses both:
- Riegel formula (
T2 = T1 * (D2/D1)^1.06) anchored on the best recent effort - Daniels VDOT when a 5k effort is available
Best efforts come from the local best_efforts table — backfilled from the
raw_json of each Run activity (Strava ships them per activity).
Pre-flight
If best_efforts is empty, the script tries to backfill from stored activities
automatically.
Run
python3 .claude/skills/run-race-predictor/scripts/race_predictor.py --recent-days 60
Present
Show the anchor effort, then 4 predicted times (5k, 10k, HM, M) with both methods side by side. Add VDOT if computed.
Post-run: update snapshot
python3 .claude/skills/athlete-snapshot/scripts/update_snapshot.py --source run-race-predictor --vdot <VDOT>
Replace <VDOT> with the computed value. Show alerts if any.
On error: auto-recovery chain
| Error contains | Action |
|---|---|
| No token / StravaAuthError | Invoke strava-setup, retry |
| best_efforts / Sync first / No best_efforts | Invoke strava-sync --level details --limit 50, retry |
| No activities / No runs | Invoke strava-sync --level summary, retry |
| anything else | Surface |
Chain at most ONCE.
After presenting: persist to memory (MANDATORY)
Save a qualitative observation to memory — opinions, patterns, coaching notes. Never store raw numeric values (those are recomputable from the DB). Only write if the observation is NEW or CHANGED vs existing memory. See CLAUDE.md → Memory protocol.
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