distributed-aggregation-and-barriers SKILL.md skillA
distributed-aggregation-and-barriers from robsonkades/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add robsonkades/agent-skills/distributed-aggregation-and-barriers@git:20261016.c769bd8Pins git:20261016.c769bd8 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- robsonkades/agent-skills
- Path
skills/distributed-aggregation-and-barriers/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261016.c769bd8, committed Oct 16, 2026
- First version recorded
- Sep 6, 2026
- Size
- 14,412 bytes
- Repository stars
- 3
- License
- Apache-2.0
Correct and recoverable aggregation across workers: algebraic laws, duplicate attempts, numeric reproducibility, mergeable summaries, barriers, joins, skew, checkpointing and partial results. Use when totals drift between runs, stragglers set job latency, worker percentiles are averaged, cardinality exhausts memory, or a join stalls on one task. It excludes request fan-out, streaming windows, percentile theory, message ordering and the broader hot-key repair catalogue.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Distributed Aggregation And Barriers ## Purpose Get one correct, reproducible answer out of many workers, and pay as little synchronisation for it as the answer requires. Two decisions carry the whole topic: what the combining function is allowed to be, and where — if anywhere — every worker must wait for every other. The failure this prevents is the aggregate that disagrees with itself. Same input, same code, a different partition order, and the total moves in the fifth decimal place; finance opens a reconciliation ticket nobody can reproduce, because the cause is that floating-point addition is not associative and the shuffle is not deterministic. The second failure is the barrier nobody named: a job of ten thousand tasks whose wall-clock time is set entirely by two of them, where adding workers changes nothing at all. ## Workflow Start with the affected job's registration or execution plan: locate the selected accumulator, combiner/finalizer, intermediate-state codec and output consumer. Reuse its aggregate definition, input snapshot, commit protocol and measured task profile before asking for missing context. …
Read the whole file at its exact version.
How to install
mdr add robsonkades/agent-skills/distributed-aggregation-and-barriers@sha256:4777a0a725768233The line at the top of this page pins the label git:20261016.c769bd8, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_n2kqoxiihpeym6aj)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 6, 2026 and Oct 16, 2026, about one every 10 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261016.c769bd8 latest | 2026-10-16 | c769bd8 | 14,412 B | A | view · diff |
| git:20260927.9ecadfd | 2026-09-27 | 9ecadfd | 13,996 B | A | view · diff |
| git:20260923.832673e | 2026-09-23 | 832673e | 13,278 B | A | view · diff |
| git:20260911.37b054b | 2026-09-11 | 37b054b | 12,580 B | A | view · diff |
| git:20260906.e6ad4bd | 2026-09-06 | e6ad4bd | 11,384 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (14412 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
robsonkades/agent-skills · 3 stars · license Apache-2.0 · pushed 2026-10-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_n2kqoxiihpeym6aj GET https://markdownregistry.com/api/v1/resolve?ref=robsonkades/agent-skills/distributed-aggregation-and-barriers GET https://markdownregistry.com/api/v1/blob/4777a0a725768233d84c95e4b2d13f8a6d53fa3a1e03ace439125d9c9829b23e
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.