fix: reuse CLI skill projection

.changeset/quiet-walls-share.md

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+---
+'incur': patch
+---
+
+Fixed HTTP and MCP command input validation to return standard validation field errors for object-shaped inputs.

.changeset/sour-dingos-shine.md

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+---
+'incur': patch
+---
+
+Fixed streaming command terminal records so HTTP NDJSON responses preserve returned `c.ok()` CTA metadata, represent returned or yielded `c.error()` values as terminal errors, include terminal duration metadata, and unwind generators on response cancellation.
+
+Also preserves `IncurError.retryable` metadata in streaming machine-format errors.

.changeset/tame-pillows-accept.md

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+---
+'incur': patch
+---
+
+Fixed generated and synced skills to use the same command projection as CLI skill output.
+
+`Skillgen` and `SyncSkills` now avoid generating duplicate skills for command aliases, preserve output schemas and examples consistently, and include the fetch gateway skill hint for fetch-based commands.