Updates docs/ai-coder/index.md, docs/ai-coder/best-practices.md, and docs/ai-coder/ai-governance.md to point readers at Coder Agents and the AI Governance Add-On instead of Coder Tasks and Agent Firewall (CODAGT-157).

Changes

• docs/ai-coder/index.md:
  • Rename ## Agents with Coder Tasks to ## Coder Agents. Drop the Devin / ChatGPT Codex name-drops and the Tasks pitch. New copy points at ./agents/index.md, names the agent loop in the control plane, and notes that workspaces can be completely network isolated. Image swapped from tasks-ui.png to agents-hero-image.png (the hero shot added in docs: add Coder Agents to README and about page #24915).
  • Replace the ## Secure Your Workflows with Agent Firewall section with ## Govern AI activity with the AI Governance Add-On. The new section opens with adoption-first framing (visibility, guardrails, cost) and links to ./ai-governance.md, with bulleted callouts for AI Gateway, Agent Firewall, and the expanded Agent Workspace Build allowance the add-on bundles.
• docs/ai-coder/best-practices.md:
  • In the use-case table, swap [Tasks](./tasks.md) to [Coder Agents](./agents/index.md) for the developer-led-investigation and prototyping rows, and swap the "Tasks API (in development)" cell to [Coder Agents API](./agents/chats-api.md) for the background-jobs row. Retitle the Security section link from "securing agents with Coder Tasks" to "securing AI agents" since security.md does not actually mention Tasks. Re-ran markdown-table-formatter to repad column widths.
  • In ## Provide Agents with Proper Context, add a paragraph describing how context is provided in Coder Agents (admin-configured system prompts, centrally registered MCP servers, and skills shipped from repos or templates under .agents/skills/), with a transition line clarifying that the existing Memory and Tools subsections cover BYO-agent patterns.
• docs/ai-coder/ai-governance.md: drop the "Additional Tasks Use (via Agent Workspace Builds)" bullet from the intro feature list and the "Expanding the use of Coder Tasks for AI-driven background work" bullet from the audience list. The ## How Coder Tasks usage is measured section and the rest of the Tasks-related prose on this page are intentionally left for a follow-up PR.

Notes for the reviewer

• The [Coder Agents API](./agents/chats-api.md) link in best-practices.md will need to be retargeted if docs: generate Chats API docs from swagger annotations #24830 (which replaces agents/chats-api.md with auto-generated reference/api/chats.md) lands first.
• This is the first slice of the Tasks-references audit. Remaining files (tasks-core-principles.md, tasks-lifecycle.md, tasks-migration.md, cli.md, github-to-tasks.md, agent-compatibility.md, the rest of ai-governance.md, custom-agents.md, ai-gateway/clients/claude-code.md, manifest.json, reference/api/tasks.md, the task* CLI references, the ESR upgrade guide, feature-stages.md, workspace-scheduling.md, shared-workspaces.md) will land in follow-up PRs against the same Linear ticket. Open PRs docs(docs/ai-coder): add deprecation notice to Coder Tasks pages #24831, docs: point to Coder Agents and drop Tasks walkthrough in quickstart #24833, and docs: add Tasks to Chats API migration guide #24841 cover separate slices and do not touch any file in this PR.
• Validation: markdownlint-cli2, markdown-table-formatter, scripts/check_emdash.sh, and make pre-commit-light all pass.

PR generated with Coder Agents.