obsidian-log

name	obsidian-log
effort	low
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.
triggers	["obsidian","write to vault","log decision","save to obsidian","update vault","obsidian log","decision log","vault write-back","milestone logged","write back","obsidian write"]

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

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

Append to an existing note

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:

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:

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:

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:

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:

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:

{
  "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

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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.