AI Agents
Coding agents and agent harnesses: tools, context and permissions. 8 notes.
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When the Harness Becomes a Platform
Skills, hooks, plugins, MCP, ACP, and SDKs extend a coding agent in different ways. Learn what each one carries and when a task actually needs it.
Harness Engineering: How Coding Agents Turn Decisions into Work · Part 6
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More Agents, More State to Own
When subagents help a coding agent: split research, use worktrees for separate edits, track budgets and cancellation, then test the final combined patch.
Harness Engineering: How Coding Agents Turn Decisions into Work · Part 5
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Who Gets to Run This Command?
How a coding agent decides which commands may run: instructions, permission rules, approval prompts, and OS sandboxes, shown with one blocked package install.
Harness Engineering: How Coding Agents Turn Decisions into Work · Part 4
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A Transcript Is Not the Context Window
How coding agents choose what the model sees: code search, compaction summaries, AGENTS.md or CLAUDE.md files, and memory checked against current files.
Harness Engineering: How Coding Agents Turn Decisions into Work · Part 3
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A Patch Is a Protocol
Why AI coding agents' edits fail, and how an edit tool should handle duplicate matches, patch errors, partial writes, and the regression test that follows.
Harness Engineering: How Coding Agents Turn Decisions into Work · Part 2
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From Model Response to Agent Execution
How a coding agent's loop runs tool calls, handles cut-off responses, errors, and cancellation, and decides when a task is done, traced through one bug fix.
Harness Engineering: How Coding Agents Turn Decisions into Work · Part 1
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Robot-Use Agents: When Frontier Models Leave the Screen
Robot-use agents use language models, skills, physical prompts and verified trials together, with constraints from contact, latency and hardware protection.
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The Age of Auto Research, and Other Certainties
This article compares tests for research proposals, experiments and claims in automated research. A better score alone cannot prove discovery.
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