Agent skill

Known Errors

A skill your agent uses when a OpenChatCut tool call fails or returns an unexpected shape.

AGPL-3.0Auto-check passedMedia & Creative

Install Known Errors

skills CLI

$ npx skills add 0xsline/OpenChatCut --skill known-errors -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install 0xsline/OpenChatCut known-errors --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/0xsline/OpenChatCut.git skills-src && mkdir -p .claude/skills && cp -r skills-src/src/agent/skills/known-errors .claude/skills/known-errors && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "known-errors" agent skill from https://github.com/0xsline/OpenChatCut/tree/main/src/agent/skills/known-errors into .claude/skills/known-errors/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "known-errors", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/0xsline/OpenChatCut/tree/main/src/agent/skills/known-errors

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add 0xsline/OpenChatCut --skill known-errors -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install 0xsline/OpenChatCut known-errors --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/0xsline/OpenChatCut.git skills-src && mkdir -p .agents/skills && cp -r skills-src/src/agent/skills/known-errors .agents/skills/known-errors && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "known-errors" agent skill from https://github.com/0xsline/OpenChatCut/tree/main/src/agent/skills/known-errors into .agents/skills/known-errors/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "known-errors", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add 0xsline/OpenChatCut --skill known-errors -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install 0xsline/OpenChatCut known-errors --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/0xsline/OpenChatCut.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/src/agent/skills/known-errors .cursor/skills/known-errors && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "known-errors" agent skill from https://github.com/0xsline/OpenChatCut/tree/main/src/agent/skills/known-errors into .cursor/skills/known-errors/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "known-errors", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/0xsline/OpenChatCut.git --path src/agent/skills/known-errors

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add 0xsline/OpenChatCut --skill known-errors -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install 0xsline/OpenChatCut known-errors --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/0xsline/OpenChatCut.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/src/agent/skills/known-errors .gemini/skills/known-errors && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "known-errors" agent skill from https://github.com/0xsline/OpenChatCut/tree/main/src/agent/skills/known-errors into .gemini/skills/known-errors/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "known-errors", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install 0xsline/OpenChatCut known-errors

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add 0xsline/OpenChatCut --skill known-errors -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/0xsline/OpenChatCut.git skills-src && mkdir -p .github/skills && cp -r skills-src/src/agent/skills/known-errors .github/skills/known-errors && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "known-errors" agent skill from https://github.com/0xsline/OpenChatCut/tree/main/src/agent/skills/known-errors into .github/skills/known-errors/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "known-errors", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add 0xsline/OpenChatCut --skill known-errors -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install 0xsline/OpenChatCut known-errors --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/0xsline/OpenChatCut.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/src/agent/skills/known-errors .opencode/skills/known-errors && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "known-errors" agent skill from https://github.com/0xsline/OpenChatCut/tree/main/src/agent/skills/known-errors into .opencode/skills/known-errors/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "known-errors", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: known-errors
GitHub stars: 2.2k
Token cost: ~882 tokens
SKILL.md length: 458 words
Files: 1
Skills in repo: 31
Repo updated: Oct 5, 2026
First seen: Oct 7, 2026
Licence: AGPL-3.0

At a glance

A skill your agent uses when a OpenChatCut tool call fails or returns an unexpected shape.

A OpenChatCut tool call fails
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Returns an unexpected shape

What it does

Known Errors is an agent skill from 0xsline/OpenChatCut. Use when a OpenChatCut tool call fails or returns an unexpected shape.

Its SKILL.md is about 880 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Media & Creative, covering Video production. The repository describes itself as: Open-source, local-first conversational AI video editor with a professional multi-track timeline, Agent Skills, MCP integration, and Remotion rendering. The licence is AGPL-3.0.

When your agent uses it

A OpenChatCut tool call fails
Returns an unexpected shape

Example prompts

“/known-errors”

What it can do on your machine

Read from SKILL.md and the folder at commit 297b327. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Known Errors loads about 882 tokens when it runs. Until then it costs about 21 tokens; SKILL.md has 458 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~21
When it runs · the whole SKILL.md, loaded when a task matches: ~882

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from 0xsline/OpenChatCut at commit 297b327, republished under its AGPL-3.0 licence (© 0xsline). 458 words, ~882 tokens.

Download SKILL.mdSave it as .claude/skills/known-errors/SKILL.md (or your agent's skills folder).

name: known-errors
description: Use when a OpenChatCut tool call fails or returns an unexpected shape.

Known Errors

edit_item update raw shape:

Wrong: { "id": "abc", "fromFrame": 30 }
Right: { "json": "{\"updates\":[{\"id\":\"abc\",\"fromFrame\":30}]}" }
Use this same updates shape for common moves, trims, and track changes.

edit_item add raw shape:

The new item goes inside the adds array of the json transaction: { "json": "{\"adds\":[{...}]}" }.
Use edit_item for simple video placement, for example { "json": "{\"adds\":[{\"type\":\"video\",\"assetId\":\"...\",\"fromFrame\":0}]}" }.

Timeline overlap:

Error text: Overlap: updated item at ... would overlap existing item at ... on this track.
Do not force the write or delete the conflicting item silently.
Retry the edit_item transaction with an explicit available trackId, for example an update containing "trackId":"V2", or ask the user which layer should win.

Workspace path restrictions:

push_asset on the external MCP only accepts public http(s) URLs as filePath. It rejects local paths, workspace paths, and chat attachment paths.
For motion-graphic assets, pass the JSX source via create_motion_graphic_from_code({ code:"...", name, width, height, durationInFrames }). push_asset no longer accepts an inline code argument.
Copying local media into the workspace is not the fix for video/audio/image/GIF imports; use asset-import and import_media instead.
Use import_media action=create_session, then run the OpenChatCut media import helper once with the returned token for client-held files.

Browser video conversion failure:

Error text often includes Unable to convert video without dropping audio/video tracks or unknown_source_codec.
Rerun the OpenChatCut media import helper; it owns frontend-aligned conversion and will surface a user-actionable error if conversion is impossible.
Do not ask the user to re-import the same file through the editor UI as a workaround — the conversion path is the same, the error will repeat. Fix the source (re-encode locally with ffmpeg) or pick a different file.
After the replacement asset is uploaded/transcribed, delete the failed original asset if it is unused. The clean final media pool should look like a successful import, not a failed import plus a replacement.

Show full SKILL.md (161 more words)Show less

Motion Graphic requirements:

push_asset(type:"motion-graphic") requires width, height, and duration or durationInFrames.
MG code must pass the OpenChatCut validator.
Root AbsoluteFill is not valid for generated MG code; use a scaling root div.
Avoid declaring a top-level local named scale inside MG code. The validator/runtime may already reserve that identifier; use a specific name such as uiScale.

Local dev Zero caveat:

When backend runs on a non-default port, use a matching Zero view-syncer configuration.
In this POC, backend 3010, editor 5177, and view-syncer 4850 are intentionally isolated from the older 3000/5173/4848 stack.

Timeline frame renderer caveat:

If view_timeline_frames fails for one frame, the project write path can still be healthy — retry with fewer frames or a different time before concluding anything.
Assets still on blob: placeholders (upload in flight) render as empty; wait for track_progress target=upload before treating a blank frame as a bug.
Do not report visual proof success unless the tool returns image content that visibly confirms the target frame.

Files

Just SKILL.md in src/agent/skills/known-errors of 0xsline/OpenChatCut.

Open the folder on GitHubat commit 297b327

Compare with similar skills

Known Errors next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Known Errors compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Known Errors this skill0xsline/OpenChatCut	2.2k	—	~882	Automated safety check: Pass	AGPL-3.0	2 days ago
HyperFrames Animationheygen-com/hyperframes	58k	3 repos	~2.1k	Automated safety check: Pass	Apache-2.0	today
Stitch to Remotion Walkthrough Videosgoogle-labs-code/stitch-skills	8.4k	6 repos	~3.2k	Automated safety check: Notes	Apache-2.0	1 mo ago
Faceless Explainer Videoheygen-com/hyperframes	58k	3 repos	~7.5k	Automated safety check: Notes	Apache-2.0	today
Video Understandcalesthio/OpenMontage	65k	—	~841	Automated safety check: Pass	AGPL-3.0	3 days ago
Video ShotcraftVincentwei1021/video-shotcraft	10k	—	~2.6k	Automated safety check: Pass	Apache-2.0	2 days ago

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Official
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Turns an article, notes or a topic brief into an explainer video whose visuals are invented per scene, built frame by frame in HyperFrames with no footage.
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Video Understand
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Questions about Known Errors

What does Known Errors do?

A skill your agent uses when a OpenChatCut tool call fails or returns an unexpected shape. Known Errors is an agent skill from 0xsline/OpenChatCut. Use when a OpenChatCut tool call fails or returns an unexpected shape.

When should I use Known Errors?

Known Errors fits situations like: A OpenChatCut tool call fails; returns an unexpected shape.

How do I install Known Errors in Claude Code?

Run `npx skills add 0xsline/OpenChatCut --skill known-errors -a claude-code`. Or copy the skill folder (src/agent/skills/known-errors in 0xsline/OpenChatCut) into .claude/skills/known-errors in your project. Claude Code loads it when a task matches its description.

How do I install Known Errors in Codex?

Run `npx skills add 0xsline/OpenChatCut --skill known-errors -a codex`. Or copy the skill folder (src/agent/skills/known-errors in 0xsline/OpenChatCut) into .agents/skills/known-errors in your project. Codex loads it when a task matches its description.

Can I use Known Errors in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add 0xsline/OpenChatCut --skill known-errors -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/known-errors, .gemini/skills/known-errors, .github/skills/known-errors and .opencode/skills/known-errors in your project.

What does Known Errors need to run?

SKILL.md names no scripts, command-line tools or credentials: Known Errors is instructions for the agent only.

Does Known Errors access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Known Errors safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Known Errors use?

Known Errors is published under the AGPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Known Errors use?

About 882 tokens (SKILL.md is roughly 3.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Known Errors?

Skills that share tags, products or a category with Known Errors: HyperFrames Animation (heygen-com/hyperframes, 58k stars), Stitch to Remotion Walkthrough Videos (google-labs-code/stitch-skills, 8.4k stars), Faceless Explainer Video (heygen-com/hyperframes, 58k stars) and Video Understand (calesthio/OpenMontage, 65k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Known Errors?

0xsline (a GitHub user) maintains it in 0xsline/OpenChatCut, which has 2,153 GitHub stars. The repository holds 31 skills in this directory. The repository was last updated on October 5, 2026.

Source: 0xsline/OpenChatCut on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Known Errors

Install Known Errors

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Known Errors

Files

Compare with similar skills

Similar skills

HyperFrames Animation

Stitch to Remotion Walkthrough Videos

Faceless Explainer Video

Video Understand

Video Shotcraft

Figma to HyperFrames

More from 0xsline/OpenChatCut

OpenChatCut Video Editing

Video Shader Generator

AI Image Generation

Livestream to Clips

Music Generation

AI Video Generation

Questions about Known Errors

Install Known Errors

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Known Errors

Files

Compare with similar skills

Similar skills

More from 0xsline/OpenChatCut

Related

Questions about Known Errors