Agent Atlas / Coding agents

anomalyco/opencode

An open coding agent with terminal, server, desktop, review, subagent, MCP, and provider surfaces that make the tool contract and client/runtime split especially visible.

Coding agent Full dossier Reported + sourced Reviewed July 21, 2026

Intended operator

Developers using a terminal or one of several clients over a shared service surface.

Primary surfaces

terminal UI / service and clients / desktop and review surfaces

Tracked repository

anomalyco/opencode

Teaching mechanism

OpenAPI becomes a typed tool contract

An adapter can turn a public API description into model-visible tools while keeping schema validation, credentials, execution, and result handling separate.

Evidence limitA valid schema does not establish that credentials are correctly scoped or that the remote API is safe and reliable.

Inspect the source

System Map

Eight inspection boundaries

Model boundary

Provider adapters sit behind a shared service and session model.

Context and memory

Sessions, messages, workspace state, resources, and compaction shape model-visible context.

Tools and execution

Built-in tools, MCP, resources, and OpenAPI adapters enter through distinct contracts and runtime handlers.

Permissions and isolation

Permissions can be scoped by tool and subagent rather than treated as one client-wide switch.

Sessions and recovery

Service-owned sessions let several clients inspect and resume work while recovery paths classify failures.

Delegation

Subagents receive distinct prompts and permission surfaces within the larger session runtime.

Human control

Review, terminal, desktop, and served-client interfaces expose work before acceptance.

Evidence surface

Service events, review diffs, MCP errors, tests, and layer boundaries make mechanisms inspectable.

Learn Through This Project

9 lessons

Chapter 1 Before the First Model Request Chapter 2 The Invisible Prompt Chapter 3 Tool Calls: Contract, Authorization, Execution Chapter 4 Loops, Workflows, and Recovery Chapter 5 Delegation Is a Distributed System Chapter 7 The Approval Trap Chapter 8 The Human Control Loop Chapter 9 Trust Must Make Its Case Chapter 10 The Future Has Three Branches

Compare Its Boundaries

8 labs

Comparison labTool Contracts Comparison labGoverned Memory Comparison labDelegation Receipts Comparison labApproval Boundaries Comparison labHuman Workbench Comparison labSessions And Recovery Comparison labEvidence And Evaluation Comparison labMaturity Signals

Latest Reporting

8 articles

Harness Engineering Is Becoming The Field's Self-Improvement Layer

July 8, 2026 — Lilian Weng's July 4 map of self-improving harnesses gives builders a constructive middle path: improve the runtime around the model, but keep evidence, permissions, and evaluation legible enough that the loop can be trusted. lilianweng/lilianweng.github.io, openai/codex, different-ai/openwork, openclaw/openclaw, NousResearch/hermes-agent, earendil-works/pi, anomalyco/opencode

Self-Evolving Agents Need Receipts For The Loop

July 8, 2026 — Shilong Liu's taxonomy widens the self-improvement story beyond harnesses: agents may optimize artifacts, modify the harness, or learn in the model, but each loop needs evidence about what changed and what stayed outside the optimizer. NousResearch/hermes-agent openai/codex openclaw/openclaw different-ai/openwork anomalyco/opencode

OpenWork Turns OpenCode Into A Shareable Agent Host

July 6, 2026 — OpenWork's source trail shows a desktop app, server, orchestrator, router, file sessions, approval flow, export safety, and single-org deployment policy around OpenCode rather than a thin UI wrapper. different-ai/openwork, anomalyco/opencode

OpenCode Turns OpenAPI Into Agent Tool Contracts

July 5, 2026 — OpenCode merged a CodeMode OpenAPI adapter on July 4, giving hosts a way to turn API specs into model-visible tools while keeping credentials and unsupported operations outside the agent's reach. anomalyco/opencode

OpenCode Turns Agent Review Into A First-Class Work Surface

July 3, 2026 — A July 2 review-panel overhaul moves OpenCode's agent output closer to a readable control surface for changed files, comments, media, and stability checks. anomalyco/opencode

OpenCode's Hardening Day Removes Layer Shortcuts

July 1, 2026 — Agent Pulse saw OpenCode as a July 1 hardening signal, and the source receipts point to layer cleanup rather than launch noise. anomalyco/opencode, github/copilot

Ope Oginni Made OpenCode's Served TUI Carry Its Keys

June 29, 2026 — A contributor patch moved OpenCode's external served TUI from implicit local assumptions toward explicit ServerAuth headers in its transport configuration. anomalyco/opencode

Shoubhit Dash Made OpenCode Read MCP Resources

June 24, 2026 — Two OpenCode commits by Shoubhit Dash turned MCP resources from connected-server metadata into tools an agent can list, template, and read with limits. anomalyco/opencode

Primary Sources

OpenCode repository

Primary service, terminal, client, and tool source.

Open Questions

Which permission and credential facts survive when several clients share one agent service?

Evidence state describes what this Atlas profile can support today. It is not a product score and it is not evidence that uninspected capabilities are absent.