Archive Daily Sub-Skill

Archives a day's content from Captive to Periodic/Daily/, transforming it into the archive format.

Input Arguments

Arguments are passed as key-value pairs:

•vault: Path to the vault
•date: Target date in YYYY-MM-DD format
•content: Full markdown content to archive (already transformed by the review skill)

Instructions

1. Validate Paths

Verify required directories exist:

bash

ls -d "$VAULT/00_Brain/Periodic/Daily/"

If missing, create it:

bash

mkdir -p "$VAULT/00_Brain/Periodic/Daily/"

2. Check for Existing Archive

Check if $VAULT/00_Brain/Periodic/Daily/{date}.md already exists:

bash

ls "$VAULT/00_Brain/Periodic/Daily/{date}.md" 2>/dev/null

If exists:

•Read existing content
•Compare with new content
•If different: Return error prompting user decision (overwrite/merge/cancel)
•If same: Return success with note "Already archived"

3. Write Archive

Write the content to $VAULT/00_Brain/Periodic/Daily/{date}.md

4. Verify Write

Read back the file to confirm write succeeded.

5. Update Today.md (Optional)

If the archive was successful and Today.md was the source:

•Replace Today.md with a minimal placeholder indicating it was archived

Placeholder content:

markdown

---
archived: {date}
---

# Archived

This day has been archived to [[00_Brain/Periodic/Daily/{date}]].

Run `/daily-planning` to start a new day.

Output

Return structured JSON:

Success:

json

{
  "success": true,
  "archive_path": "/Users/.../00_Brain/Periodic/Daily/2026-02-14.md",
  "bytes_written": 4096,
  "today_cleared": true
}

Already exists (same content):

json

{
  "success": true,
  "archive_path": "/Users/.../00_Brain/Periodic/Daily/2026-02-14.md",
  "already_existed": true,
  "message": "Archive already exists with matching content."
}

Already exists (different content):

json

{
  "success": false,
  "error": "archive_conflict",
  "archive_path": "/Users/.../00_Brain/Periodic/Daily/2026-02-14.md",
  "message": "Archive already exists with different content.",
  "suggestion": "Review existing archive or confirm overwrite."
}

Error:

json

{
  "success": false,
  "error": "write_failed",
  "message": "Failed to write archive: {system_error}"
}

Error Cases

Condition	Error Message
Vault not found	"Vault directory does not exist: {vault}"
Cannot create directory	"Failed to create Periodic/Daily directory"
Archive conflict	"Archive already exists with different content"
Write failed	"Failed to write archive: {system_error}"
Verification failed	"Write verification failed: content mismatch"

Safety

•Always check for existing archive before writing
•Never overwrite without explicit user confirmation
•Archive is write-only to Periodic/Daily/ (never to other directories)
•Today.md placeholder preserves a link to the archive