Agent skill

Obsidian Log

by grandamenium in grandamenium/cortextos

Write key decisions, project milestones, and feedback rules back to the Obsidian vault.

MITAuto-check passedProduct & Project Management

Install Obsidian Log

skills CLI

$ npx skills add grandamenium/cortextos --skill obsidian-log -a claude-code

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

GitHub CLI

$ gh skill install grandamenium/cortextos obsidian-log --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/grandamenium/cortextos.git skills-src && mkdir -p .claude/skills && cp -r skills-src/community/skills/obsidian-log .claude/skills/obsidian-log && 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 "obsidian-log" agent skill from https://github.com/grandamenium/cortextos/tree/main/community/skills/obsidian-log into .claude/skills/obsidian-log/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "obsidian-log", 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/grandamenium/cortextos/tree/main/community/skills/obsidian-log

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 grandamenium/cortextos --skill obsidian-log -a codex

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

GitHub CLI

$ gh skill install grandamenium/cortextos obsidian-log --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .agents/skills && cp -r skills-src/community/skills/obsidian-log .agents/skills/obsidian-log && 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 "obsidian-log" agent skill from https://github.com/grandamenium/cortextos/tree/main/community/skills/obsidian-log into .agents/skills/obsidian-log/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "obsidian-log", 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 grandamenium/cortextos --skill obsidian-log -a cursor

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

GitHub CLI

$ gh skill install grandamenium/cortextos obsidian-log --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/community/skills/obsidian-log .cursor/skills/obsidian-log && 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 "obsidian-log" agent skill from https://github.com/grandamenium/cortextos/tree/main/community/skills/obsidian-log into .cursor/skills/obsidian-log/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "obsidian-log", 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/grandamenium/cortextos.git --path community/skills/obsidian-log

--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 grandamenium/cortextos --skill obsidian-log -a gemini-cli

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

GitHub CLI

$ gh skill install grandamenium/cortextos obsidian-log --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/grandamenium/cortextos.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/community/skills/obsidian-log .gemini/skills/obsidian-log && 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 "obsidian-log" agent skill from https://github.com/grandamenium/cortextos/tree/main/community/skills/obsidian-log into .gemini/skills/obsidian-log/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "obsidian-log", 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 grandamenium/cortextos obsidian-log

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 grandamenium/cortextos --skill obsidian-log -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .github/skills && cp -r skills-src/community/skills/obsidian-log .github/skills/obsidian-log && 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 "obsidian-log" agent skill from https://github.com/grandamenium/cortextos/tree/main/community/skills/obsidian-log into .github/skills/obsidian-log/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "obsidian-log", 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 grandamenium/cortextos --skill obsidian-log -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 grandamenium/cortextos obsidian-log --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/community/skills/obsidian-log .opencode/skills/obsidian-log && 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 "obsidian-log" agent skill from https://github.com/grandamenium/cortextos/tree/main/community/skills/obsidian-log into .opencode/skills/obsidian-log/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "obsidian-log", 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: obsidian-log
GitHub stars: 101
Token cost: ~1k tokens
SKILL.md length: 303 words
Files: 1
Skills in repo: 55
Repo updated: Sep 23, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Write key decisions, project milestones, and feedback rules back to the Obsidian vault.

Works in 3 steps: Log a decision (daily decisions log) → Log a project milestone → Log a durable feedback rule
Tasks that involve Project management
SKILL.md covers When to Use, CLI Reference, Workflow and Keep the KB Current, plus 1 more section
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Obsidian Log is an agent skill from grandamenium/cortextos. Write key decisions, project milestones, and feedback rules back to the Obsidian vault. Use this after confirming any architectural decision, project milestone, or durable feedback rule — keeps the vault current with agent memory.

Its SKILL.md is about 1k 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 Product & Project Management, covering Project management and Agent memory. It works with Obsidian. The licence is MIT.

When your agent uses it

Tasks that involve Project management
Tasks that involve Agent memory

Example prompts

“/obsidian-log”

Workflow steps

3 steps, taken from the step headings in SKILL.md.

Log a decision (daily decisions log)
Log a project milestone
Log a durable feedback rule

What it can do on your machine

Read from SKILL.md and the folder at commit 6f93838. 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 (its code samples are bash and json).
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

Obsidian Log loads about 1k tokens when it runs. Until then it costs about 61 tokens; SKILL.md has 303 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~61
When it runs · the whole SKILL.md, loaded when a task matches: ~1k

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 grandamenium/cortextos at commit 6f93838, republished under its MIT licence (© grandamenium). 303 words, ~1,047 tokens.

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

name: obsidian-log
description: Write key decisions, project milestones, and feedback rules back to the Obsidian vault. Use this after confirming any architectural decision, project milestone, or durable feedback rule — keeps the vault current with agent memory.
effort: low
triggers: obsidian, write to vault, log decision, save to obsidian, update vault, obsidian log, decision log, vault write-back, milestone logged, write back, obsidian…

Obsidian Log Skill

Write agent decisions and milestones back to the Obsidian vault so it stays current with agent memory. Use after confirming any significant decision, project milestone, or durable feedback rule.

When to Use

Trigger this skill when you:

Confirm an architectural or product decision (e.g. "we decided X approach for Y")
Complete a project milestone and want it recorded (e.g. "feature Z shipped")
Receive and confirm a durable feedback rule (e.g. "always do X, never do Y")
Finish an onboarding or knowledge distillation session

Do NOT log every task or message — only decisions and milestones that should persist across agents and sessions.

CLI Reference

The Obsidian CLI writes directly to vault notes. Replace [VAULT_NAME] with your configured vault name.

Create or overwrite a note

bash

obsidian vault=[VAULT_NAME] create path="<note-path>" content="<content>" overwrite

Append to an existing note

bash

obsidian vault=[VAULT_NAME] append path="<note-path>" content="<content>"

Workflow

1. Log a decision (daily decisions log)

Decisions go to 01-Memory/decisions-YYYY-MM-DD.md. Append so the daily file accumulates entries:

bash

TODAY=$(date +%Y-%m-%d)
obsidian vault=[VAULT_NAME] append \
  path="01-Memory/decisions-${TODAY}.md" \
  content="
## [HH:MM] <Decision title>

**Decision:** <What was decided>
**Why:** <Reasoning or constraint that drove it>
**Impact:** <What changes as a result>
**Agent:** [AGENT_NAME]
"

If the daily file does not exist yet, use create instead of append:

bash

TODAY=$(date +%Y-%m-%d)
obsidian vault=[VAULT_NAME] create \
  path="01-Memory/decisions-${TODAY}.md" \
  content="# Decisions — ${TODAY}

## [HH:MM] <Decision title>

**Decision:** <What was decided>
**Why:** <Reasoning or constraint that drove it>
**Impact:** <What changes as a result>
**Agent:** [AGENT_NAME]
" overwrite

2. Log a project milestone

Project milestones append to 02-Projects/<project-name>.md:

bash

obsidian vault=[VAULT_NAME] append \
  path="02-Projects/<project-name>.md" \
  content="
## Milestone — $(date +%Y-%m-%d)

**What shipped:** <Feature or deliverable>
**Status:** Complete
**Notes:** <Any relevant context>
"

3. Log a durable feedback rule

Feedback rules that should persist append to 01-Memory/agent-feedback.md:

bash

obsidian vault=[VAULT_NAME] append \
  path="01-Memory/agent-feedback.md" \
  content="
## $(date +%Y-%m-%d) — <Rule title>

**Rule:** <The feedback rule>
**Why:** <Reason given by user or inferred>
**Agent:** [AGENT_NAME]
"

Keep the KB Current

After writing to the vault, ingest the updated memory folder so agents can find it via KB search:

bash

cortextos bus kb-ingest <vault-path>/01-Memory --org [ORG] --scope shared

You can also add a daily cron entry to config.json to keep the KB automatically current:

json

{
  "name": "daily-memory-kb-ingest",
  "cron": "0 4 * * *",
  "prompt": "Ingest today's memory files into the KB: cortextos bus kb-ingest <vault-path>/01-Memory --org [ORG] --scope shared. Log the result.",
  "type": "recurring"
}

Checklist Before Writing

Is this a decision, milestone, or feedback rule — not just a task update?
Does the vault path match the correct date / project name?
Use append if the file exists, create with overwrite if starting fresh for the day
Ingest 01-Memory/ after writing so the KB reflects the new entry

Deployment note: replace [VAULT_NAME], [AGENT_NAME], and [ORG] with your actual values. Add the vault path to your agent's TOOLS.md so it is available at session start.

Files

Just SKILL.md in community/skills/obsidian-log of grandamenium/cortextos.

Open the folder on GitHubat commit 6f93838

Compare with similar skills

Obsidian Log 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.

Obsidian Log compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Obsidian Log this skillgrandamenium/cortextos	101	—	~1k	Automated safety check: Pass	MIT	18 days ago
Project Managerespennilsen/pi	122	—	~2.1k	Automated safety check: Pass	MIT	19 days ago
CCPM Project Managementautomazeio/ccpm	8.4k	—	~1.1k	Automated safety check: Pass	MIT	6 mo ago
Qmdbreferrari/obsidian-mind	5k	—	~1.7k	Automated safety check: Pass	MIT	5 days ago
Agent RecallGoldentrii/AgentRecall-X	371	—	~5.2k	Automated safety check: Notes	MIT	13 days ago
Jira Natural Language Interfacejjmartres/opencode	133	3 repos	~1.7k	Automated safety check: Pass	MIT	5 mo ago

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Works with

Obsidian

Questions about Obsidian Log

What does Obsidian Log do?

Write key decisions, project milestones, and feedback rules back to the Obsidian vault. Obsidian Log is an agent skill from grandamenium/cortextos. Write key decisions, project milestones, and feedback rules back to the Obsidian vault.

When should I use Obsidian Log?

Obsidian Log fits situations like: tasks that involve Project management; tasks that involve Agent memory.

How do I install Obsidian Log in Claude Code?

Run `npx skills add grandamenium/cortextos --skill obsidian-log -a claude-code`. Or copy the skill folder (community/skills/obsidian-log in grandamenium/cortextos) into .claude/skills/obsidian-log in your project. Claude Code loads it when a task matches its description.

How do I install Obsidian Log in Codex?

Run `npx skills add grandamenium/cortextos --skill obsidian-log -a codex`. Or copy the skill folder (community/skills/obsidian-log in grandamenium/cortextos) into .agents/skills/obsidian-log in your project. Codex loads it when a task matches its description.

Can I use Obsidian Log 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 grandamenium/cortextos --skill obsidian-log -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/obsidian-log, .gemini/skills/obsidian-log, .github/skills/obsidian-log and .opencode/skills/obsidian-log in your project.

What does Obsidian Log need to run?

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

Does Obsidian Log 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 Obsidian Log 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 Obsidian Log use?

Obsidian Log is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Obsidian Log use?

About 1k tokens (SKILL.md is roughly 4.2k 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 Obsidian Log?

Skills that share tags, products or a category with Obsidian Log: Project Manager (espennilsen/pi, 122 stars), CCPM Project Management (automazeio/ccpm, 8.4k stars), Qmd (breferrari/obsidian-mind, 5k stars) and Agent Recall (Goldentrii/AgentRecall-X, 371 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Obsidian Log?

grandamenium (a GitHub user) maintains it in grandamenium/cortextos, which has 101 GitHub stars. The repository holds 55 skills in this directory. The repository was last updated on September 23, 2026.

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

Install Obsidian Log

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Obsidian Log Skill

When to Use

CLI Reference

Create or overwrite a note

Append to an existing note

Workflow

1. Log a decision (daily decisions log)

2. Log a project milestone

3. Log a durable feedback rule

Keep the KB Current

Checklist Before Writing

Files

Compare with similar skills

Similar skills

More from grandamenium/cortextos

Related

Questions about Obsidian Log