Performs git archaeology, changelog analysis, and builds a verified factual timeline by cross-referencing git history with source material. REX mode only (skipped automatically in Concept mode).
SkillScore95Maintained
Automatic
◆Research pack
Last verified 10/8/2026
What it changes
Passed 20 of 21 test cases with the skill, and 9 of 21 without it.
Without skill43%
With skill95%
Checks it passed that the model alone missed
Generates `talks/2024-cloud-cost-timeline.md`.
Creates `talks/2024-auth-overhaul-timeline.md`.
Refuses to execute state-changing git commands.
and 14 more in the full report
11 fixed9 passed either way1 still failing0 broke2 errored
Pass-rate lift
+52 pp
Tokens
+32%
Agent turns
0%
Response time
-44%
Model gemini-3.6-flashMeasured 10/8/2026v220 of 23 cases passed with skill · 21 comparable
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 11
Prompt
For the Stage 1 summary `talks/2024-cloud-cost-summary.md`, what are the exact output file paths for the research deliverables?
case-19 · gemini-3.6-flash · 10/8/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md186 linessingle file
Talk Stage 2: Research (REX mode only)
Builds the git proof for a REX talk. Cross-references git history, CHANGELOG, and the Stage 1 summary to produce a verified timeline and velocity analysis.
Automatically skipped in --concept mode. Only runs when the source material is a REX with git repository access.
When to use this skill
After Stage 1 (Extract) when building a REX talk
When you have access to the project's git repository
To verify metrics mentioned in the source material against actual git data
What this skill does
Reads the summary: understands the period and themes from Stage 1