Add X-Realize-Client identity header to MCP requests#5
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Wire an outgoing X-Realize-Client header on every Realize MCP request via
the .mcp.json `headers` block, mirrored in the SessionStart CLI fallback
(scripts/ensure-realize-mcp.sh) so plugin-provided and CLI-installed
sessions stay consistent. Version is sourced from plugin.json in the
script; .mcp.json uses ${REALIZE_PLUGIN_VERSION:-0.3.0} as an override
hatch with a correct default.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
yanush88
requested review from
chrishall-taboola,
vladimanaev and
yuri-g-taboola
July 16, 2026 11:54
The static ${REALIZE_PLUGIN_VERSION} in .mcp.json never populates: a
SessionStart hook can't inject env vars into the parent Claude Code
process that reads .mcp.json, so it always emitted the default.
Switch to a `headersHelper` (scripts/mcp-headers.sh) that Claude Code
runs at each connection and merges into request headers. For a
plugin-provided server it runs with CLAUDE_PLUGIN_ROOT set and cwd at
the plugin root, so the helper reads the version live from
.claude-plugin/plugin.json — true single source of truth, no env var,
always current. Requires Claude Code v2.1.195+.
The CLI-install fallback (ensure-realize-mcp.sh) keeps a static
--header since `claude mcp add` has no headers-helper flag; its version
is still resolved from plugin.json at add time. Comment updated to
explain the split.
Verified on the wire: helper output lands as
`x-realize-client: realize-mcp-plugin/0.3.0` on Claude's MCP request.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Wire an outgoing X-Realize-Client header on every Realize MCP request via the .mcp.json
headersblock, mirrored in the SessionStart CLI fallback (scripts/ensure-realize-mcp.sh) so plugin-provided and CLI-installed sessions stay consistent. Version is sourced from plugin.json in the script; .mcp.json uses ${REALIZE_PLUGIN_VERSION:-0.3.0} as an override hatch with a correct default.