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ispyisail 08b83f23e3 qet-mcp: say what to do when QElectroTech refuses to run scripts
#984 switches JavaScript scripting off by default, and five tools here
drive QElectroTech through --run: qet_query, qet_continuity, qet_check,
qet_project_new, qet_edit. Against such a build they all stop working, and
what came back was exit code 3 and a paragraph of French naming a settings
dialog nobody driving an MCP server is looking at.

Nothing needed building to make them work again -- _run_qet() inherits its
environment, so QET_ENABLE_SCRIPTING=1 in the "env" block of the client's
own configuration already reaches QElectroTech. Verified both ways against
a #984 binary: without it qet_query returns ok=false exit=3, with it
ok=true and the rows.

So this is about saying so. The refusal is now recognised and answered with
an instruction the caller can act on, keyed on QElectroTech naming the
variable with exit 3 as a fallback for a future build that words it
differently. Two older hints fitted the same symptom and were overwriting
it -- "the binary never ran the script ... is it a build with --run
support?" sends the reader to check the one thing that is fine -- so both
now yield to whatever the launch already reported. qet_check builds its
answer fresh rather than layering onto the launch result, so it carries the
reason across explicitly; without that every check read "no result came
back", which is true and tells nobody why.

The server does not set the variable itself, on purpose. A switch a program
turns on for itself is not a switch: whoever configured this server and
pointed it at a QElectroTech binary made that choice, and their interactive
QElectroTech keeps whatever its own setting says. README says this, and the
registration example now shows the env block with both variables in it.

Six tests, faking subprocess.run so they cost no launch. Two are structural
rather than behavioural: one fails if either older hint goes back to
assigning over the specific one, the other reads which tools actually pass
script= to _run_qet and fails if the hint's list of them drifts. Both were
mutation-checked by reintroducing exactly those mistakes.

176 tests pass with QET_BINARY, QET_ELEMENTS, QET_EXAMPLES and
QET_ENABLE_SCRIPTING set.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-09-23 04:35:46 +12:00
..
2012-04-04 18:43:10 +00:00
2012-04-04 18:43:10 +00:00
2026-04-25 12:54:52 +02:00