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AGENTS.md@internal/compressionA

AGENTS.md@internal/compression from iohub/yagent is an AGENTS.md file: the standing instructions coding agents read in that repo.

Install it, pinned

mdr add iohub/yagent/internal/compression/AGENTS.md@git:20261028.19903d6

Pins git:20261028.19903d6 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 14 of 14 checks passed
Kind: AGENTS.md file
Repository: iohub/yagent
Path: internal/compression/AGENTS.md
Versions recorded: 3
Latest version: git:20261028.19903d6, committed Oct 28, 2026
First version recorded: Oct 21, 2026
Size: 6,281 bytes
Repository stars: 31
License: Apache-2.0

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# internal/compression — 三档上下文压缩

> 范围：本目录内不可派生的约束。全局摘要见仓库根 `AGENTS.md` §6.5。
> （原 `docs/compression-trigger-design.md` 已不存在，规格由本文件持有。）

## 边界

把"是否超阈值"和"超了怎么削"的三档算法收在一处。**不负责**决定何时调用自己（两个循环各两处调用点，
共四处）、不持有会话、不写 rollout。

## 硬约束

**1. 判定只有一处实现：`OverThreshold`，严格大于（等于不触发）**（`truncate.go:99-107`）。
不要再抄 `EstimateMessagesTokens(messages) > threshold`——抄开的表现是"子 Agent 与 Director 的
触发时机不一致"。四处调用点漏改一处的情况由 `internal/agents/executor_prefix_trigger_test.go`
跨包盯着（本包单测在那种情况下是全绿的）。

**2. `ResolveThreshold` 两个来源都是上限、取小**（`threshold.go:49-59`）：目录回答"这个模型装得下多少"，
配置回答"我愿意为此付多少"。**provider 的 `context_window` 完全不参与**（它只影响 TUI 进度条）。
`YAGENT_COMPRESS_THRESHOLD` 是第 0 级、只给调试用，且**每次现读不缓存**（`:21-22,60-62`）——
生产配置不要用它，它绕过一切、会让压缩早于模型真实容量触发。

**3. ⚠️ 同一个函数有两种调用语义。** 压缩触发传配置值；**重放预算传 `0`**（要纯模型容量，不参与取小），
见 `:56-59`。把取小套到重放预算上，能让本来可重放的委派**全部**降级成交接报告（不报错，只是恢复不了）。

**4. 计量口径 `Prefix` 只在可用时使用**（`truncate.go:73-99`）：`Refresh` 三条规则（失败保留 /
无 usage 作废 / 成功以 sentLen 为界）两个循环共用（`:108-121`）。作废后逐字回落到全量本地估算，
那才是改动前的行为。**偏差一律偏大，所以这个数只用于判定，`stats` 一律保持本地口径**（`:88-99`、
`truncate_results.go:40-46`）——否则 TUI ⧉ 面板的百分比是两个基数混在一起。

**5. token 估算包含 `Reasoning` 与工具调用参数**（`truncate.go:47-58`）。漏算不是"少几个 token"，
是压缩触发时机系统性偏晚。
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add iohub/yagent/internal/compression/AGENTS.md@sha256:f69eba8e0ad90517

The line at the top of this page pins the label git:20261028.19903d6, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_zegqhtsbe65nx67m.svg)](https://markdownregistry.com/a/art_zegqhtsbe65nx67m)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 3 versions of this file, between Oct 21, 2026 and Oct 28, 2026, about one every 3 days.

version	committed	commit	size	audit
git:20261028.19903d6 latest	2026-10-28	19903d6	6,281 B	A	view · diff
git:20261024.9b44441	2026-10-24	9b44441	6,219 B	A	view · diff
git:20261021.9f5bf87	2026-10-21	9f5bf87	4,589 B	A	view

Audit of the latest version

A 14 of 14 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Size between 200 bytes and 200 KB (6281 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

iohub/yagent · 31 stars · license Apache-2.0 · pushed 2026-11-05 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_zegqhtsbe65nx67m
GET https://markdownregistry.com/api/v1/resolve?ref=iohub/yagent/internal/compression/AGENTS.md
GET https://markdownregistry.com/api/v1/blob/f69eba8e0ad905175004b707005df79ceff1f9e8722b0e9d9bdd9d65bfc33177

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: how to write a good AGENTS.md · AGENTS.md vs CLAUDE.md · which agent file does what.