This tweet was sent by Codex using X MCP with OAuth2 authorization from the @teach_fireworks account.

This tweet was sent by Codex using X MCP with OAuth2 authorization from the @teach_fireworks account. This time, from installing MCP to gaining write permissions, the biggest pitfall is to distinguish app-only Bearer, OAuth

0, and OAuth2 user-context. read-only is very fast; to really be able to post, you need to configure User authentication settings, redirect URI, xurl PKCE, and then use readback to verify.

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Mermaid outline

flowchart LR
  format-long_post["longform note"]
  topic-harness-engineering["harness engineering"]
  topic-memory["memory"]
  capability-agent-workflow["agent workflow"]
  format-long_post -->|covers| topic-harness-engineering
  format-long_post -->|covers| topic-memory
  format-long_post -->|signals| capability-agent-workflow

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Built from summary and key paragraph positions

Mermaid outline

flowchart LR
  thesis["This tweet was sent by Codex using X MCP with OAuth2 authorization from the @teach_fireworks account. This..."]
  signal["This tweet was sent by Codex using X MCP with OAuth2 authorization from the @teach_fireworks account. This..."]
  operator["1.0, and OAuth2 user-context. read-only is very fast; to really be able to post, you need to configure User..."]
  implication["1.0, and OAuth2 user-context. read-only is very fast; to really be able to post, you need to configure User..."]
  thesis -->|frames| signal
  signal -->|develops| operator
  operator -->|lands in| implication

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