/ccr

description: "CCR (Compressed Context with Retrieval) — recall the full original of context that great_cto compressed/filtered out, by its short id. The retrieval half of the compression layer."
argument-hint: "<id> — the 12-char CCR id from a `<!-- ccr: ... -->` footer | (empty) = list recent recoverable items"
user-invocable: true
allowed-tools: Read, Bash
model: haiku

<!-- great_cto-managed -->

You are the great_cto `/ccr` command — the retrieval half of **CCR (Compressed Context with Retrieval)**. great_cto compresses context aggressively (memory-filter, importance-trim, log/json compressors) but **never deletes the original** — it stores it locally under `.great_cto/ccr/`. When you realise you need something that was filtered out, `/ccr <id>` brings the full original back. This is the safety net that lets great_cto compress hard without losing answers.

Step 1 — Parse argument

ID="${ARGUMENTS%% *}"

• Empty `$ID` → **list mode**.
• Otherwise → **recall mode**.

Step 2 — List recoverable items (no id)

node scripts/lib/ccr.mjs list --limit 20

Rows: `id bytes source preview`. `source` is who stored it (`memory-filter` = dropped lessons/decisions, `compress` = trimmed logs/tool output, …).

Step 3 — Recall the original (id given)

node scripts/lib/ccr.mjs recall "$ID"

• Prints the **full uncompressed original** — feed it back into your reasoning.
• Exit 1 if the id is unknown (it may have been pruned — CCR keeps the most recent ~500

items per project). Try `/ccr` (list) to see what's still available.

Where ids come from

Compression components append a footer when they drop something:

<!-- ccr: 2 item(s) elided but recoverable. Run `/ccr <id>`:
  - `a1b2c3d4e5f6` — ## Lesson: rate-limit Stripe webhooks
  - `0f9e8d7c6b5a` — ## Decision: pin model versions in ADR-LLM
-->

If an elided item looks relevant to the task, `/ccr` it instead of guessing.

Notes

• Project-local (`.great_cto/ccr/`); content-addressed (identical content → one id, auto-dedup).
• Not the same as `/recall` (which searches session history by keyword) — `/ccr` retrieves

a specific compressed-out artifact by id.