Markit
shift-labs-ai/markit
Convert files and URLs to Markdown. An agent skill from shift-labs-ai/markit.
Use in Codex when a user asks to read, analyze, summarize, or extract from a heavyweight file such as PDF, DOCX, PPTX, XLSX, CSV, or TSV.
Install Heavy File Ingestion Codex
$ npx skills add NateBJones-Projects/OB1 --skill heavy-file-ingestion-codex -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install NateBJones-Projects/OB1 heavy-file-ingestion-codex --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/NateBJones-Projects/OB1.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/heavy-file-ingestion/variants/codex .claude/skills/heavy-file-ingestion-codex && rm -rf skills-srcUse ~/.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/
Install the "heavy-file-ingestion-codex" agent skill from https://github.com/NateBJones-Projects/OB1/tree/main/skills/heavy-file-ingestion/variants/codex into .claude/skills/heavy-file-ingestion-codex/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "heavy-file-ingestion-codex", 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 install https://github.com/NateBJones-Projects/OB1/tree/main/skills/heavy-file-ingestion/variants/codexType 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.
$ npx skills add NateBJones-Projects/OB1 --skill heavy-file-ingestion-codex -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install NateBJones-Projects/OB1 heavy-file-ingestion-codex --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/NateBJones-Projects/OB1.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/heavy-file-ingestion/variants/codex .agents/skills/heavy-file-ingestion-codex && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "heavy-file-ingestion-codex" agent skill from https://github.com/NateBJones-Projects/OB1/tree/main/skills/heavy-file-ingestion/variants/codex into .agents/skills/heavy-file-ingestion-codex/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "heavy-file-ingestion-codex", 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.
$ npx skills add NateBJones-Projects/OB1 --skill heavy-file-ingestion-codex -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install NateBJones-Projects/OB1 heavy-file-ingestion-codex --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/NateBJones-Projects/OB1.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/heavy-file-ingestion/variants/codex .cursor/skills/heavy-file-ingestion-codex && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "heavy-file-ingestion-codex" agent skill from https://github.com/NateBJones-Projects/OB1/tree/main/skills/heavy-file-ingestion/variants/codex into .cursor/skills/heavy-file-ingestion-codex/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "heavy-file-ingestion-codex", 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 https://github.com/NateBJones-Projects/OB1.git --path skills/heavy-file-ingestion/variants/codex--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add NateBJones-Projects/OB1 --skill heavy-file-ingestion-codex -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install NateBJones-Projects/OB1 heavy-file-ingestion-codex --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/NateBJones-Projects/OB1.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/heavy-file-ingestion/variants/codex .gemini/skills/heavy-file-ingestion-codex && rm -rf skills-srcUse ~/.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/
Install the "heavy-file-ingestion-codex" agent skill from https://github.com/NateBJones-Projects/OB1/tree/main/skills/heavy-file-ingestion/variants/codex into .gemini/skills/heavy-file-ingestion-codex/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "heavy-file-ingestion-codex", 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.
$ gh skill install NateBJones-Projects/OB1 heavy-file-ingestion-codexInstalls 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).
$ npx skills add NateBJones-Projects/OB1 --skill heavy-file-ingestion-codex -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/NateBJones-Projects/OB1.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/heavy-file-ingestion/variants/codex .github/skills/heavy-file-ingestion-codex && rm -rf skills-srcUse ~/.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/
Install the "heavy-file-ingestion-codex" agent skill from https://github.com/NateBJones-Projects/OB1/tree/main/skills/heavy-file-ingestion/variants/codex into .github/skills/heavy-file-ingestion-codex/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "heavy-file-ingestion-codex", 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.
$ npx skills add NateBJones-Projects/OB1 --skill heavy-file-ingestion-codex -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install NateBJones-Projects/OB1 heavy-file-ingestion-codex --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/NateBJones-Projects/OB1.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/heavy-file-ingestion/variants/codex .opencode/skills/heavy-file-ingestion-codex && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "heavy-file-ingestion-codex" agent skill from https://github.com/NateBJones-Projects/OB1/tree/main/skills/heavy-file-ingestion/variants/codex into .opencode/skills/heavy-file-ingestion-codex/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "heavy-file-ingestion-codex", 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
heavy-file-ingestion-codex- GitHub stars
- 4.7k
- Token cost
- ~570 tokens
- SKILL.md length
- 240 words
- Files
- 1
- Skills in repo
- 24
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Use in Codex when a user asks to read, analyze, summarize, or extract from a heavyweight file such as PDF, DOCX, PPTX, XLSX, CSV, or TSV.
- Works in 6 steps: Do not open the raw heavyweight file as… → Run the bundled converter from this… → If the environment is clean and needs… → …
- Tasks that involve CSV and tabular files
- SKILL.md covers Problem, Trigger Conditions, Process and Client Rules, plus 1 more section
- Calls python and uv
What it does
Heavy File Ingestion Codex is an agent skill from NateBJones-Projects/OB1. Use in Codex when a user asks to read, analyze, summarize, or extract from a heavyweight file such as PDF, DOCX, PPTX, XLSX, CSV, or TSV. Convert the file into markdown or CSV first with the bundled script, generate a lightweight index, and only spend model tokens on the compressed artifact.
Its SKILL.md is about 570 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 Documents & Office, covering CSV and tabular files, Excel spreadsheets and Word documents. It works with Microsoft Excel, Microsoft PowerPoint and Microsoft Word. The repository describes itself as: Open Brain — The infrastructure layer for your thinking. One database, one AI gateway, one chat channel — any AI plugs in. No middleware, no SaaS.
When your agent uses it
- Tasks that involve CSV and tabular files
- Tasks that involve Excel spreadsheets
- Tasks that involve Word documents
Example prompts
- “/heavy-file-ingestion-codex”
Requirements
- Python 3
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Do not open the raw heavyweight file as your first move if a deterministic conversion path exists.
- Run the bundled converter from this skill directory
- If the environment is clean and needs packages, prefer
- Read index.md first, not the original file.
- Follow the index recommendation
- Use expensive model context only after the file has already been compressed into a smaller artifact.
What it can do on your machine
Read from SKILL.md and the folder at commit 238df6c. 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
Shell commands in SKILL.md call:
pythonuv
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use uv, which can reach the network depending on how they are called.
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
Heavy File Ingestion Codex loads about 570 tokens when it runs. Until then it costs about 80 tokens; SKILL.md has 240 words of instructions outside code blocks.
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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 240 words (~570 tokens).
“Codex can run local commands and inspect files, so direct ingestion of bulky documents is usually the wrong move. Convert first, index second, reason last.”
- name
- heavy-file-ingestion-codex
- author
- Nate B. Jones
- version
- 1.0.0
Files
Just SKILL.md in skills/heavy-file-ingestion/variants/codex of NateBJones-Projects/OB1.
Open the folder on GitHubat commit 238df6c
Compare with similar skills
Heavy File Ingestion Codex 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Heavy File Ingestion Codex this skillNateBJones-Projects/OB1 | 4.7k | — | ~570 | Automated safety check: Pass | Custom licence | |
| Markitshift-labs-ai/markit | 1.3k | — | ~299 | Automated safety check: Pass | MIT | |
| File Intelearlyaidopters/second-brain | 194 | — | ~481 | Automated safety check: Pass | None | |
| Markdown Converterintellectronica/agent-skills | 295 | 4 repos | ~492 | Automated safety check: Pass | CC0-1.0 | |
| Light File ReadingLight0305/Light-skills | 640 | — | ~4.1k | Automated safety check: Pass | MIT | |
| Document Converterwentorai/Research-Claw | 858 | — | ~1.3k | Automated safety check: Pass | Custom licence |
Similar skills
File Intel
earlyaidopters/second-brain
Run the Gemini file processor on any folder — extracts content from PDF, PPTX, XLSX, DOCX, CSV, JSON, and any text format, then generates Obsidian-ready summaries.
Markdown Converter
intellectronica/agent-skills
Convert documents and files to Markdown using markitdown. An agent skill from intellectronica/agent-skills.
Light File Reading
Light0305/Light-skills
Light 多格式文件深度理解常驻技能：强大地读 Word / PDF / PPTX / Excel / CSV / 图片 / 视频 / 代码 / 压缩包，不只提取文字，而是理解结构 / 图表 / 数据 / 格式要求 / 隐含意图，产结构化"理解笔记"五面 （结构逻辑·关键内容·格式约束·视觉风格·可复用）并映射到下游技能动作（这个文件→接下来能做什么）。
Document Converter
wentorai/Research-Claw
Convert Office documents (PPTX, DOCX, XLSX, PDF, HTML, CSV, JSON, XML, images) to Markdown using Microsoft MarkItDown.
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More from NateBJones-Projects/OB1
All 24 skills in this repoHeavy File Ingestion
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Converts large PDF, DOCX, PPTX, XLSX and CSV files into markdown or CSV plus an index before the agent reads them, so tokens go to the compressed copy.
Aiception Skill Extraction
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Pulls reusable knowledge out of work sessions and turns it into new skills, checking existing notes and skills first to avoid duplicates.
Claude Code Auto-Capture Hook
NateBJones-Projects/OB1
Fires a Stop hook that captures a Claude Code session transcript automatically when the session ends without a verbal wrap-up.
Open Brain Local HTTP
NateBJones-Projects/OB1
Captures and searches personal notes in a self-hosted Open Brain using plain curl calls over HTTP, for setups where MCP is disabled or blocked.
Panning for Gold
NateBJones-Projects/OB1
Processes voice transcripts and brain dumps in three phases, extracting every idea thread, evaluating the strongest and saving a permanent inventory and synthesis.
Agentic Harness Design and Review
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Designs, evaluates and improves the harness around an AI agent: tool permissions, approval gates, state, memory, evals and observability, with phased plans.
Related
Categories
Questions about Heavy File Ingestion Codex
What does Heavy File Ingestion Codex do?
Use in Codex when a user asks to read, analyze, summarize, or extract from a heavyweight file such as PDF, DOCX, PPTX, XLSX, CSV, or TSV. Heavy File Ingestion Codex is an agent skill from NateBJones-Projects/OB1. Use in Codex when a user asks to read, analyze, summarize, or extract from a heavyweight file such as PDF, DOCX, PPTX, XLSX, CSV, or TSV.
When should I use Heavy File Ingestion Codex?
Heavy File Ingestion Codex fits situations like: tasks that involve CSV and tabular files; tasks that involve Excel spreadsheets; tasks that involve Word documents.
How do I install Heavy File Ingestion Codex in Claude Code?
Run `npx skills add NateBJones-Projects/OB1 --skill heavy-file-ingestion-codex -a claude-code`. Or copy the skill folder (skills/heavy-file-ingestion/variants/codex in NateBJones-Projects/OB1) into .claude/skills/heavy-file-ingestion-codex in your project. Claude Code loads it when a task matches its description.
How do I install Heavy File Ingestion Codex in Codex?
Run `npx skills add NateBJones-Projects/OB1 --skill heavy-file-ingestion-codex -a codex`. Or copy the skill folder (skills/heavy-file-ingestion/variants/codex in NateBJones-Projects/OB1) into .agents/skills/heavy-file-ingestion-codex in your project. Codex loads it when a task matches its description.
Can I use Heavy File Ingestion Codex 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 NateBJones-Projects/OB1 --skill heavy-file-ingestion-codex -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/heavy-file-ingestion-codex, .gemini/skills/heavy-file-ingestion-codex, .github/skills/heavy-file-ingestion-codex and .opencode/skills/heavy-file-ingestion-codex in your project.
What does Heavy File Ingestion Codex need to run?
Going by SKILL.md and its folder, Heavy File Ingestion Codex needs the command-line tools its instructions call (python and uv). Our summary lists: Python 3.
Does Heavy File Ingestion Codex access the network?
SKILL.md contains no URLs. Its commands use uv, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Heavy File Ingestion Codex 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 Heavy File Ingestion Codex use?
Heavy File Ingestion Codex has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Heavy File Ingestion Codex use?
About 570 tokens (SKILL.md is roughly 2.3k 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 Heavy File Ingestion Codex?
Skills that share tags, products or a category with Heavy File Ingestion Codex: Markit (shift-labs-ai/markit, 1.3k stars), File Intel (earlyaidopters/second-brain, 194 stars), Markdown Converter (intellectronica/agent-skills, 295 stars) and Light File Reading (Light0305/Light-skills, 640 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Heavy File Ingestion Codex?
NateBJones-Projects (a GitHub organization) maintains it in NateBJones-Projects/OB1, which has 4,710 GitHub stars. The repository holds 24 skills in this directory. The repository was last updated on October 9, 2026.
Source: NateBJones-Projects/OB1 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.