uefn-validation-failure-diagnosis SKILL.md skillA
uefn-validation-failure-diagnosis from mimmo-the-root/uefn-dream-bot-team is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mimmo-the-root/uefn-dream-bot-team/uefn-validation-failure-diagnosis@git:20261016.5b4e0c6Pins git:20261016.5b4e0c6 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mimmo-the-root/uefn-dream-bot-team
- Path
user-level-skills/uefn-validation-failure-diagnosis/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261016.5b4e0c6, committed Oct 16, 2026
- Size
- 1,785 bytes
- Repository stars
- 10
- License
- MIT
Diagnosing "StartSession Failed: Validation failed" or an editor MCP that stays silent for minutes after session start, by reading the UEFNValidation log.
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
# uefn-validation-failure-diagnosis
## When
`ValkyrieToolset.SessionToolset/StartSession` replies `Failed: Validation failed`, or the MCP stops responding right after.
## Procedure (verified)
1. The MCP reply does not contain the cause. Call `EditorToolset.LogsToolset/GetLogEntries` con `{"category":"","maxEntries":0,"pattern":"UEFNValidation"}` (recipe `GetLogEntries#why_startsession_failed`, verified). ALWAYS with the pattern: without a filter ~2.4 MB.
2. Extract the lines `UEFNValidation: Error:` and the names of the actors that follow.
3. Verified cause: an actor `/Script/Engine.TargetPoint` in the level (`Disallowed reference to /Script/Engine.TargetPoint`).
4. Fix in the level: `SceneTools/remove_from_scene {"actor":{"refPath":"<attore>"}}` (verified), then ONE single new StartSession attempt.
## Pitfalls
- After a failure the MCP may stay silent for minutes (T-006): ping, wait, never loop.
- A failed call writes a line `LogScript: Warning:`: the log is never empty; filter out `LogModelContextProtocol` (`GetLogEntries#filter_noise`).
- `SceneTools/replace_actors_with_class` TargetPoint->StaticMeshActor fails (log only): do not use it as a fix.
## Don't
…Read the whole file at its exact version.
How to install
mdr add mimmo-the-root/uefn-dream-bot-team/uefn-validation-failure-diagnosis@sha256:87ba049cf4392c85The line at the top of this page pins the label git:20261016.5b4e0c6, 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_aaxbgdfovaftnnkd)
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Versions
The registry has recorded 1 version of this file, committed on Oct 16, 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 (1785 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
mimmo-the-root/uefn-dream-bot-team · 10 stars · license MIT · pushed 2026-10-18 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_aaxbgdfovaftnnkd GET https://markdownregistry.com/api/v1/resolve?ref=mimmo-the-root/uefn-dream-bot-team/uefn-validation-failure-diagnosis GET https://markdownregistry.com/api/v1/blob/87ba049cf4392c851f3e921f1bd257ee4d86daa6851b8b6d1c0850b2a81ae678
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.