{"version":"2.1.321","anchor":"skill-compatibility-frontmatter-surfaced-to-the-model-beh","canonical_anchor":"skill-compatibility-frontmatter-surfaced-to-the-model-beh","heading":"Skills can tell Claude what environment they need, behind a switch that is off by default","tier":"soon","area":"Skills","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.321\/e\/skill-compatibility-frontmatter-surfaced-to-the-model-beh","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.321","markdown":"### Skills can tell Claude what environment they need, behind a switch that is off by default\n\nA skill's `compatibility` note can be shown to Claude, so it says plainly when a skill needs your own computer or network that it cannot reach\n\n**What**\n\nA skill is a packaged set of instructions Claude can follow for a particular job. Skills begin with a short header of settings called frontmatter. When a server-controlled switch is on, the `compatibility` field from that header is added to the skill's text that Claude reads. The added text has a length limit.\n\nIt is followed by guidance for Claude. If the skill needs your own computer or a private network and nothing in the current environment can reach it, Claude should say so and offer what it can still do.\n\nThe switch is off unless it is turned on remotely, and it has read off for this site's account.\n\n**Why**\n\nThis changes how skills that depend on local machines or private networks behave in cloud sessions: Claude explains the limit instead of failing quietly.\n\n- Flag `tengu_fancy_canyon`: Off in both readings (read for one account on one subscription tier against v2.1.321; this account: off, anonymous baseline: off, compiled default: off) These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.\n- Area: Skills\n- Names: `compatibility`\n- Tier: Nothing to try yet\n- Useful: 3\/5\n- Signal: 4\/5\n- Scope: individual\n- Heads-up: no\n- Present in the build but not switched on"}