The HAR journal

Notes from the factory floor.

Architecture, field notes, and practical patterns for building reliable coding-agent workflows.

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7 essays

ArchitectureJuly 18, 2026 · 8 min

Why coding agents need a harness, not another prompt.

Coding models can edit files. Reliable software work requires a surrounding system that can isolate, launch, verify, and explain what happened.

Design notes5 min

Portable infrastructure starts by keeping the operating knowledge beside the source code.

Workflow6 min

Why a green check should carry logs, artifacts, timing, and an exact tree hash.

Release3 min

A tour of the latest improvements across the CLI, MCP surface, and dashboard.

$ har env launch 2
✓ worktree ready
✓ services running

Field notes7 min

A practical look at process collisions, dirty state, ports, and unreviewable changes.

Architecture9 min

Isolation also means services, environment, databases, lifecycle, and verification.

Design notes5 min

Stable generic stages beat a growing collection of framework-specific agent tools.