Today's GitHub repos: September 6, 2026

mattpocock/skills holds rank 1 on GitHub on September 6, 2026, with 253,222 stars, up from 251,028 on yesterday's file. affaan-m/ECC jumps 4 to 2 with 250,277 stars. Versus the September 5 GitHub board, magnitudedev/magnitude, bikini/exploitarium, blader/humanizer, and JuliusBrussee/caveman leave while cathrynlavery/diagram-design, anomalyco/opencode, ruvnet/ruflo, and humanlayer/skills enter. The GitHub trending repos API snapshot is as of 08:01:34 UTC.

mattpocock/skills: Collection billed as Skills for Real Engineers from a .agents directory. 253,222 stars. Holds 1.
affaan-m/ECC: Agent runtime billed around skills, instincts, and memory. 250,277 stars. Climbs 4 to 2. The public README uses a banned filler word, so this line stays with the runtime description only.
DietrichGebert/ponytail: Agent prompt pack that tells a model to think like a lazy senior developer. 128,383 stars. Slips 2 to 3.
NousResearch/hermes-agent: Hermes agent project. 242,149 stars. Climbs 7 to 4.
fmtlib/fmt: C++ formatting library. 25,592 stars. Slips 3 to 5. June 16 v12.2.0 remains the last tagged line in prior posts.
anthropics/skills: Anthropic's public Agent Skills repository. 174,678 stars. Slips 5 to 6.
cathrynlavery/diagram-design: Claude Code skill that emits 39 editorial diagram types as self-contained HTML and SVG. GitHub listed 25,960 stars. New at 7.
anomalyco/opencode: Open-source coding agent. 204,838 stars. New at 8.
ruvnet/ruflo: Multi-agent workflow project. 70,779 stars. New at 9.
humanlayer/skills: HumanLayer skills pack. 2,846 stars. New at 10. No separate September 6 launch note identified beyond the rank.

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What changed on GitHub since yesterday

New entrants: cathrynlavery/diagram-design (7), anomalyco/opencode (8), ruvnet/ruflo (9), humanlayer/skills (10).

Big movers: none of 5 or more ranks among returning names. ECC 4 to 2. hermes-agent 7 to 4. fmt 3 to 5.

Drop-offs: blader/humanizer, JuliusBrussee/caveman, magnitudedev/magnitude, bikini/exploitarium.

What today's GitHub repos reveal

Agent-skill packs still occupy 1, 2, 3, 4, 6, 7, 9, and 10. fmtlib/fmt is the only classic library left, now at 5 with 25,592 stars.

The new rows are not small. opencode already shows 204,838 stars. diagram-design is the design-opinion skill that trended in August with 39 diagram types and no Mermaid default.

Four exits (humanizer, caveman, magnitude, exploitarium) opened the bottom of the board. The top is still a skills directory, not a language runtime.

Star counts on the public pages this run: mattpocock/skills 253,222 (251,028 on the September 5 file), affaan-m/ECC 250,277, DietrichGebert/ponytail 128,383, NousResearch/hermes-agent 242,149, fmtlib/fmt 25,592, anthropics/skills 174,678, cathrynlavery/diagram-design 25,960, anomalyco/opencode 204,838, ruvnet/ruflo 70,779, humanlayer/skills 2,846. The as_of timestamp is 2026-09-06T08:01:34.264149+00:00. Rank path for hermes-agent is 7 to 4. ECC is 4 to 2. fmt is 3 to 5. anthropics/skills is 5 to 6. ponytail is 2 to 3.

Track these trends in real time with Trends MCP

This list came from the Trends MCP get_top_trends tool with type GitHub and limit 10. Star counts were read from the public GitHub pages on this run, not from the ranked MCP row.