Writing

Notes on Claude Code, coding agents, LLMs in production, and what goes into a harness.

• August 25, 2026 What Claude Code training costs in France

  Public prices from five French training vendors, collected in late August 2026, and what a crawl of their catalogs actually proves.

• March 28, 2026 Every agent works in the demo

  The resumption contract: what a fresh session reads first, why conversation history is not state, and the test that separates a demo from production.

• March 28, 2026 Most SKILL.md files work once

  What makes an agent skill hold up past the first session: a trigger-clear description, a short file, scripts for deterministic work, a resumption contract.

• March 28, 2026 The 99% problem

  Compound error rates in long agent pipelines, the success table at 99, 95 and 90 percent per step, and why shorter segments beat better models.

• March 28, 2026 The model is the easy part

  Scaffolding moves task completion more than model choice does, and what a production agent harness has to hold up under.

• March 28, 2026 Your agent isn't confused. It's drowning.

  Context bloat as the main undiagnosed failure mode: tool overload, raw corpora handed to agents, and subagents used as context firewalls.

• March 25, 2026 The context envelope: what your LLM chat agent needs but isn't getting

  The JSON payload a web app should wrap around every chat turn: six sections, the prompt injection and cache gotchas, and a ship order to follow.

• March 25, 2026 The MCP paradox

  A year of MCP: the integration problem it solved, the context bloat it created, the CLI comeback, and why the real constraint on agents is attention.

• March 25, 2026 TypeScript vs JavaScript for AI agents: the feedback loop is everything

  The compiler gives a coding agent a loop it can close on its own. Without it you are the loop, and the regression and token numbers show the gap.

• March 25, 2026 Your new job title is AI office manager

  Most of the day around a coding agent is plumbing. What compounds is the CLAUDE.md files, the skills, and the connectors that make a workspace usable.