What is kumiho-backfill?

A history-import tool for finding useful memories in past Codex conversations, preparing them locally, and importing only reviewed items into Kumiho, a memory system for coding assistants.

It helps backfill memories from Codex sessions and, when explicitly scoped, from Claude history or ChatGPT exports.

It avoids blindly copying old chat history into memory. Local staging and review help limit the import to the requested conversations and date range.

kumiho-backfill — Skill for Claude Code and Codex by KumihoIO

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add KumihoIO/kumiho-plugins --skill kumiho-backfill

Clone the repo

git clone --depth 1 https://github.com/KumihoIO/kumiho-plugins

Made for: Claude Code, Codex.

Or install kumiho-memory-cloud, the plugin that ships this one along with the rest of its 5 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/kumihoio/kumiho-plugins/kumiho-backfill/github.svg)](https://agentmods.dev/skills/kumihoio/kumiho-plugins/kumiho-backfill)

Your own site

<a href="https://agentmods.dev/skills/kumihoio/kumiho-plugins/kumiho-backfill"><img src="https://agentmods.dev/badge/skills/kumihoio/kumiho-plugins/kumiho-backfill/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/kumihoio/kumiho-plugins/kumiho-backfill"><img src="https://agentmods.dev/badge/skills/kumihoio/kumiho-plugins/kumiho-backfill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,263 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00046	$0.01263
Opus 5.5	$0.00018	$0.00505
Sonnet 5.5	$0.00009	$0.00253
Haiku 4.5	$0.00005	$0.00126

Measured 1mo ago against content hash 34239b51c26e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

kumiho-backfill scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/prepare_backfill.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

cloud-mcp/directory/kumiho-memory/skills/kumiho-backfill/SKILL.md · 100 lines

How it starts

The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Kumiho History Backfill

Turn authorized historical context into useful reviewed memories. Use the host model for distillation and the connected OAuth MCP for storage. No SDK install, separate API key or background process is required. User scope overrides defaults.

Choose accessible input

In a local Codex or Claude Code environment, read only user-selected session files or an explicitly authorized date/source selection. A default history location is not permission to scan it. Codex and Claude Code histories are separate opt-in sources. A Claude Code session is one top-level .jsonl file per conversation; files under a session's subagents/ folder are not.
In Cowork, use only files the user has shared with the session, such as a copied session file or export in a folder they selected. Do not claim access to history elsewhere on their computer.
In ChatGPT, use a user-provided export or excerpts that are actually accessible in the conversation. Do not claim access to all prior ChatGPT chats or the user's computer. If file processing is unavailable, accept a small selected excerpt; do not invent a terminal or request a whole archive unnecessarily.
The helper does not parse a claude.ai account data export. For claude.ai chats, accept small selected excerpts instead.
Explain that selected text is processed by the current host's model provider; only approved distilled captures are sent to the connected Kumiho workspace. Inspection/extraction does not authorize ingestion.

Prepare and distill

When file execution is available, use the bundled stdlib-only scripts/prepare_backfill.py. Resolve the path from this skill; never assume a repository or installed plugin cache path. Choose an available Python 3.11+ runtime; do not install packages or change authentication.

python <skill>/scripts/prepare_backfill.py prepare --source codex --input <selected.jsonl> --out <new-batch-directory>
python <skill>/scripts/prepare_backfill.py prepare --source chatgpt --input <conversations.json> --conversation <selected-id> --out <new-batch-directory>

Read the full file on GitHub · 100 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago Changed · +10 lines · +1 tokens per session 34239b51c26e
1mo ago Changed · -10 lines · -32 tokens per session d18d5c451a7d
2mo ago First seen · 100 lines · 77 tokens per session scan A 807400b9cc59

Subscribe to this mod's changes

kumiho-backfill is a skill published in the GitHub repository KumihoIO/kumiho-plugins (2 stars, last pushed 5d ago), licensed MIT. It adds 46 tokens to every session and 1,263 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-05.

Memory and context

kumiho-backfill next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
kumiho-backfillKumihoIO/kumiho-plugins	Skill	2	5d ago	MIT	A	46	Claude Code, Codex
knowledge-ingestopenclaw/openclaw	Skill	394k	today	MIT	A	80	Claude Code, Codex
mem0-oss-to-platformmem0ai/mem0	Skill	69k	yesterday	Apache-2.0	A	217	Claude Code, Codex
forgetasgeirtj/system_prompts_leaks	Skill	71k	today	CC0-1.0	A	0	Claude Code, Codex
Cortexdanielmiessler/LifeOS	Skill	20k	2d ago	MIT	A	184	Claude Code
memoryopensquilla/opensquilla	Skill	7.1k	2d ago	Apache-2.0	A	44	Claude Code, Codex
ha-data-storesshiwenwen/hope-agent	Skill	1.9k	today	MIT	A	115	Claude Code, Codex