Not switched on
Useful2 Signal3
Changed MCP server instructions would be re-sent instead of suppressed, but that needs the disabled discovery cache.
Instruction blocks now store each server's own text so changes can re-emit, gated on the MCP discovery cache which is off by default.
What's wrong with this entry?
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What
The record of MCP server instructions now keeps each server's own instruction text next to the rendered block, so a still-connected server whose instructions changed gets its block re-sent instead of suppressed as already present. Re-emitting on change requires the MCP discovery cache, which is not enabled by default.
Evidence
tengu_mcp_instructions_pool_change
Strings lifted out of the shipped bundle, so the claim above can be checked against them.