feat(post): 工具三部曲——spec-harness/pi-mesh 全家桶/Agensh 论文笔记

用户直派车道交付：①Spec Harness 详解（任务包解剖+流水线图，
boundary/verify 实例+12 命令+门禁）②pi-mesh 四件套（stack 图+
合奏循环图+上手安装）③Agensh 论文笔记（三支柱/协作环/规模收
益图，DeLM 血统+issue#13→pi-board 诞生线）。七张自绘 SVG、双
语（en 手写直译 locked:true，禁 TMT 覆盖）。与既有 spec-
workflow-and-mesh（实战复盘向）互补并存。

车道：worker-one（build/lint/外链 curl/视觉两轮 7/7 全绿）；收
编复验 E2E 34/34+lint 43 页 0/0/0

验证: pnpm astro build 39 文；E2E 34/34；content-lint 0/0/0

Spec: none (内容三篇，直派车道收编)

Co-authored-by: GLM-5.3

content/posts-en/agensh.md

@@ -0,0 +1,53 @@
+---
+title: "Agensh: Scaling Organizational Intelligence to 1,024 Agents"
+pubDate: 2026-11-01
+category: tech
+tags: [Paper Notes, AI Collaboration]
+locked: true
+---
+
+Multi-agent systems compress the latency of complex tasks through concurrency, but mainstream frameworks share one ceiling: the central orchestrator. Task allocation, progress aggregation, and result adjudication all squeeze through a single context — the bigger the scale, the sooner the orchestrator dies. In October 2026, Microsoft Research open-sourced [Agensh](https://github.com/microsoft/Agensh) — a self-organized multi-agent harness **with no central orchestrator**, and the paper [*Scaling Organizational Intelligence to 1,024 Agents*](https://arxiv.org/abs/2609.26781) pushed it to a thousand and twenty-four agents.
+
+Its answer is disarmingly simple: instead of building a smarter scheduling brain, hand the agents the coordination infrastructure of a human organization, as is.
+
+## 1. Three pillars: an organization's coordination infrastructure
+
+![From central orchestration to self-organization](../posts/assets/agensh/pillars.svg)
+
+Agensh provides exactly three pieces of infrastructure; everything else self-organizes:
+
+- **Shared workspace**: a git platform carries the organization's in-progress and integrated work — branches, PRs, and merge conflicts, twenty years of human machinery reused as-is;
+- **Message interface**: a team channel plus direct messages with priority delivery — organization-wide broadcasts and urgent collision resolution each take their own lane;
+- **Shared context**: a typed-entry board holding the organization's findings and work intentions.
+
+The open-source reference implementation runs Gitea for the workspace and Mattermost for channel and DMs — a fully self-hosted "office" with no proprietary services. No orchestrator assigns tasks: workers find work themselves in the workspace and the context board, claim it, verify it, and merge it. The natural bottleneck of scaling — that ever-busier hub — simply does not exist.
+
+## 2. The cooperation loop: every worker runs their own lap
+
+![The multi-agent cooperation loop](../posts/assets/agensh/loop.svg)
+
+Every worker concurrently and asynchronously runs the same loop: **gather context → claim a sub-task → take action → verify → merge progress**. Gathering context means reading the shared workspace and the board's accumulated knowledge; claiming is a CLAIM declaration, with collisions resolved over direct messages; verification is running the tests yourself — evidence talks; merging goes through PRs.
+
+The most interesting design is the **economy** of the shared context: entries are deliberately tiny (about 100 characters, 300 for PATCH_SUMMARY), with the long version in a `detail` field fetched on demand; `board_read` serves only the latest 2,000 entries, and anything older is reachable only through boolean search (`,` = OR, `&` = AND) — recent memory stays small, the long tail is searched. The paper calls **FAIL the highest-value entry**: one documented falsified path stops the whole team from re-burning budget on the same dead end. New entries are pushed to peers as higher-priority updates at their next tool-call boundary.
+
+This shared context is not Agensh's invention — §2.3 of the paper states plainly that "the shared context follows the core idea of DeLM". [DeLM](https://github.com/yuzhenmao/DeLM) ([arXiv:2606.10662](https://arxiv.org/abs/2606.10662)) ran decentralized multi-agent coordination through a shared context and task queue: its board is an append-only event log (items, claims, completions, FACT/FAIL notes, status) with bodies stored in a separate database beside the log, hard limits (≤40 files, ≤400 KB total), and a blocking `read --wait` that wakes when a peer posts. On a 10-task Terminal-Bench 4.0 subset, two agents coordinating through the shared context averaged +12.5 percentage points accuracy and a 1.78× speedup. Agensh scaled that thread to a thousand agents.
+
+## 3. The numbers: does scaling actually help?
+
+![Scaling gains](../posts/assets/agensh/scale.svg)
+
+Two datasets answer "do more agents actually move the needle": on the five hardest ProgramBench tasks, 1 → 128 agents raised the pass rate from 19.31% to 28.78% (~49% relative); on building pandoc from scratch (6-hour budget, no Internet), 1 → 1,024 agents raised it from 33.89% to 55.06%. For problems where raw compute has hit diminishing returns, **the marginal return of organization is still there**.
+
+Engineering readiness arrived too: v1.0 shipped on 2026-10-23, and v1.0.1 six days later supports Copilot, Codex, Claude Code, and Pi as the underlying single-agent harness — use whatever mainline model you like underneath. The open-source release is a single-node harness, and the v1.0 package ships with a reproduction guide, the paper, and a demo — from paper to runnable repository with no "coming soon" in between.
+
+## 4. From paper to desktop: the story of one issue
+
+For us this paper was never just on paper. After digesting it, on 2026-10-23 I filed [issue #13](https://github.com/cgarrot/pi-mesh/issues/13) on the pi-mesh repository: pi-mesh already had the message interface (`mesh_send`, rooms, priorities) and the shared workspace (git + `mesh_reserve`), but lacked the third pillar, shared context — proposing `board_write / board_read / board_grep` in exactly the Agensh/DeLM shape.
+
+The maintainer cgarrot's reply is the most instructive part of the story: the direction was right, but **the hash-only ledger makes pi-mesh structurally incapable of being that board** — embedding persistence in the broker would turn a router into a database. The right shape was a separate package: join the room as a normal peer, own your storage, and let the mesh keep routing. Thus [pi-board](https://github.com/wait4xx/pi-board): v0.1 landed within a day — 55 tests, zero failures, a nine-step smoke run on a real broker — and when the issue finally closed, the official pointer landed on it. The memory layer of the [four-piece toolkit](/en/archives/pi-mesh-stack/) introduced in the previous post grew straight out of this paper.
+
+## 5. Closing
+
+Agensh's insight is not the number "1024" but its decomposition of organizational intelligence: workspace, messages, shared context — three pillars holding up self-organization, none of which needs a smarter brain. The decomposition holds at thousand-agent scale, holds for a local four-piece toolkit, and holds for a one-person shop with a few agent terminals. Scale changes; the pillars stay.
+
+Related reading: [Spec Harness in Depth](/en/archives/spec-harness/) · [The pi-mesh Tool Family](/en/archives/pi-mesh-stack/)