CharlesWiltgen/Axiom v27.3.1 on GitHub

Released October 8, 2026

Tool references – The xclog, xcsym and xcprof references now explain how to run each tool in every harness, including Pi and MCP clients, and map each command-line flag to its MCP parameter.
dSYM discovery – xcsym’s help, its reference and the MCP tool descriptions explain that --dsym applies to every image, and that --dsym-paths roots are searched last and replace XCSYM_DSYM_PATHS. The axiom_xcsym_crash MCP tool also describes the CLI’s exit codes.

iOS and Xcode facts – Claude Code, Codex, Cursor, Pi, the MCP server and every subagent now receive the same iOS and Xcode facts, naming the selected Xcode and its iOS SDK.
Xcode selection – Axiom now follows the Xcode you’ve switched to, as xcrun does: AXIOM_XCODE_PATH when set, otherwise xcode-select -p, which honors DEVELOPER_DIR in its .app or Contents/Developer form. Session context, Apple documentation read from inside Xcode (by the assistant or the MCP server) and xcui all use that Xcode.
Claude Code sessions – Axiom’s session-start context now fits within the 10,000 characters Claude Code keeps inline, so the assistant receives all of it, and it lists every bundled tool.
Prompt routing – Skill suggestions in Claude Code now come only from what the user typed, not from the task reminders and notifications Claude Code adds to a prompt.

Skill attribution – When an Axiom skill materially shapes an answer, the assistant now names it once (“per Axiom’s axiom-data skill”), in every harness.

Full Changelog: v27.3.0...v27.3.1

CharlesWiltgen/Axiom v27.3.1 Axiom v27.3.1 on GitHub