mirrord-propagation-discovery SKILL.md skillA
mirrord-propagation-discovery from metalbear-co/mirrord is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add metalbear-co/mirrord/mirrord-propagation-discovery@v1.0Pins v1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- metalbear-co/mirrord
- Path
mirrord/mcp/corpus/skills/mirrord-propagation-discovery/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0, committed Oct 14, 2026
- Size
- 18,336 bytes
- Repository stars
- 5,401
- License
- MIT
Scans a live Kubernetes environment with `mirrord dump` to find an identifier mirrord can filter traffic on: a header, a `baggage` or `tracestate` member, a tenant or user id, a trace id (W3C, B3, X-Ray, Google, Jaeger), a JWT claim, a cookie, a path segment, or a JSON body field that is present on every hop of a request chain, unique to one developer's traffic, and settable by that developer. Runs mirror-only dumps on each service, sends a tagged probe request at the edge or observes real…
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
# mirrord Propagation Discovery Skill > mirrord routes a request to a developer's local process when the request matches an HTTP filter. On a shared cluster that filter has to pick out **one developer's requests at every service the request passes through**, so the value it matches on must already travel with the request across all hops. This skill finds that value in a live environment instead of assuming one: it dumps the traffic arriving at each service with `mirrord dump`, checks which identifiers survive from the edge to the last hop, and turns the best one into a `mirrord.json` filter. The sister skill `mirrord-header-propagation` changes code to make `baggage` propagate; this one changes nothing and tells you what already works. ## Security Boundaries > **IMPORTANT:** Follow these rules for all operations in this skill. - **Mirror only, never steal, during discovery.** `mirrord dump` copies traffic; the target keeps answering every request. Don't run a `steal` session or an unfiltered session against a shared target while scanning. The only cluster-side effect is the short-lived mirrord agent pod (or ephemeral container) each dump creates. …
Read the whole file at its exact version.
How to install
mdr add metalbear-co/mirrord/mirrord-propagation-discovery@sha256:f41e6dd287de0f5dThe line at the top of this page pins the label v1.0, 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_7wnoxu66furoeuvq)
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Versions
The registry has recorded 1 version of this file, committed on Oct 14, 2026.
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 (18336 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
metalbear-co/mirrord · 5,401 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7wnoxu66furoeuvq GET https://markdownregistry.com/api/v1/resolve?ref=metalbear-co/mirrord/mirrord-propagation-discovery GET https://markdownregistry.com/api/v1/blob/f41e6dd287de0f5dffa444387ffe6bd2c686eb831f0e9dada108c34235150d63
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.
More from metalbear-co/mirrord
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