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Quarter Clone · ykdojo | DecimalAI

agent toolingby ykdojo

Quarter Clone

ykdojo/quarter-clone

Source ykdojo/claude-code-tips ↗License NOASSERTION

Clone the last quarter of the current conversation, discarding earlier context to reduce token usage while preserving recent work.

SkillScore86Maintained

Automatic

AI Engineer pack

Last verified 8/11/2026

What it changes

Passed 16 of 19 test cases with the skill, and 7 of 19 without it.

Without skill36%

With skill86%

Checks it passed that the model alone missed

Uses tail -1 on ~/.claude/history.jsonl
Outputs claude --resume <new-session-id>
Includes jq -r '[.sessionId, .project] | @tsv'

and 9 more in the full report

11 fixed8 passed either way3 still failing0 broke

Pass-rate lift: +50 pp
Tokens: -39%
Agent turns: 0%
Response time: -59%

Model gemini-3.6-flashMeasured 8/11/2026v119 of 22 cases passed with skill · 19 comparable

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/ykdojo-quarter-clone/SKILL.md https://app.decimal.ai/s/ykdojo-quarter-clone/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add ykdojo-quarter-clone, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/ykdojo-quarter-clone/ and pins it in .decimal/skills.lock

decimalai skills add ykdojo-quarter-clone

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/ykdojo-quarter-clone/SKILL.md https://app.decimal.ai/s/ykdojo-quarter-clone/SKILL.md

Raw file: /s/ykdojo-quarter-clone/SKILL.md ↗ · machine-readable summary at /s/ykdojo-quarter-clone.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 11

Prompt

Write a one-liner to parse the last entry of ~/.claude/history.jsonl and yield session ID and project path separated by a tab.

What was checked, without and with the skill
Checked	Without skill	With skill
Includes jq -r '[.sessionId, .project] \| @tsv'	Missed	Passed

case-14 · gemini-3.6-flash · 8/11/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md17 linessingle file

Clone the last quarter of the current conversation, discarding earlier context to reduce token usage while preserving recent work.

Steps:

Get the current session ID and project path: tail -1 ~/.claude/history.jsonl | jq -r '[.sessionId, .project] | @tsv'
Find half-clone-conversation.sh with bash: find ~/.claude -name "half-clone-conversation.sh" 2>/dev/null | sort -V | tail -1
- This finds the script whether installed via plugin or manual symlink
- Uses version sort to prefer the latest version if multiple exist
- The same script handles both half and quarter cloning; --quarter selects quarter mode
Preview the conversation to verify the session ID: <script-path> --preview <session-id> <project-path>
- Check that the first and last messages match the current conversation
Run the clone: <script-path> --quarter <session-id> <project-path>
- Always pass the project path from the history entry, not the current working directory
The script prints the new session ID (the New session: <id> line). Give the user the exact command to resume it directly, no picker needed:
```
claude --resume <new-session-id>
```
The script automatically appends a reference to the original conversation at the end of the cloned file. (The new session is also marked [QUARTER-CLONE <timestamp>], e.g. [QUARTER-CLONE Jan 7 14:30], so claude -r and picking it works as a fallback.)

Track record

Benchmark

16 / 19

test cases passed, vs 7 / 19 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

ykdojo / claude-code-tips

skills/quarter-clone/SKILL.md

View on GitHub ↗

License NOASSERTIONImported 8/3/2026Version v1

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

ykdojo/half-cloneClone the later half of the current conversation, discarding earlier context to reduce token usage while preserving recent work.Close match+36 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.