docs(proposal): mxcli microflow debugger — breakpoints by name - #44
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Turns the runtime-debugger investigation from the mxcli-sudoku findings/README (and its scripts/mfdebug.sh wrapper) into a supported feature proposal. The Mendix microflow debugger spans two APIs: the M2EE admin plane (:8090, X-M2EE-Authentication) toggles enable/disable/status, and the app endpoint (<app>/debugger/, X-Debugger-Authentication) drives start_session / add_breakpoint / get_paused_microflows / get_object / step_* / continue. A breakpoint's object_id is an activity's model GUID, which nothing in the runtime surfaces. mxcli is uniquely positioned: run --local already owns the admin password + app URL, and sdk/mpr/parser_microflow.go already extracts each activity's $ID — so it can offer breakpoints BY NAME (Module.Flow --activity Name) rather than by GUID. The proposal specifies the `mxcli debug` command surface, a DebuggerClient for the second plane, the name→GUID resolver, warm-loop integration, safety (a breakpoint pauses the browser too; auto-disable on interrupt), five slices, tests, open questions, and a DAP-bridge follow-up. Docs-only; no code. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01JXnEgoc2NQP1Y2TWMCMXC4
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Two check gaps confirmed with mx check on Mendix 11.12.1 — both pass mxcli check but fail the build: - MDL048 (#42): `retrieve … where [id = $Var]` → CE0161. Mendix XPath has no id operator reachable from a microflow expression. Regex a word-boundaried `id` before a comparison (a user attribute can't be named `id`). Hint points at a GUID marketplace action OR exposing the id as a String on a view entity via `cast(id as string)` and constraining on that column. - MDL049 (#43/#44): a call argument bound to an association-object path (`B = $Edit/M.Edit_Budget`) → CE0117. An association path isn't a value; it must be retrieved first. Flags an AttributePathExpr whose final segment is module-qualified (an association → object); an attribute value over the same association (`…/Name`) is not flagged. Tests: TestValidateMicroflow_XPathIdConstraint, _AssociationObjectArg. Repros + symptom table. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01JXnEgoc2NQP1Y2TWMCMXC4
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Summary
Investigation + design proposal turning the
ako/mxcli-sudokuruntime-debugger findings (and itsscripts/mfdebug.shwrapper) into a supportedmxcli debugfeature.What the investigation found
The Mendix microflow debugger spans two APIs:
:8090,X-M2EE-Authentication) — toggles only:enable_debugger {password},disable_debugger,get_debugger_status.<app>/debugger/,X-Debugger-Authentication: base64(pass)) — the protocol:start_session(→session_token),add_breakpoint {microflow_name, object_id, condition?},get_paused_microflows,get_object,step_over|into|out,continue|continue_all,remove_breakpoint.paramsis mandatory even when{}; onlyX-Debugger-Authenticationworks (raw/Basic/Bearer → 401{}).The blocker for humans: a breakpoint's
object_idis an activity's model GUID (little-endian .NET GUID in the.mpr), and nothing in the runtime surfaces it.Why mxcli is the right home: confirmed against the code —
run --localalready owns the admin password + app URL (docker.CallM2EE), andsdk/mpr/parser_microflow.goalready extracts each activity's$ID. So mxcli can offer breakpoints by name (mxcli debug break Module.Flow --activity ACT_Name) rather than by GUID — which no other tool can.What the proposal specifies
mxcli debugcommand surface (status/enable/break/breaks/unbreak/paused/inspect/step/continue/disable) with name→GUID resolution and internal session-token handling.DebuggerClientfor the second plane; admin plane reusesCallM2EE.run --localreuse (flagless common case) + optionalrun --local --debug.statusshows paused count).run --localintegration run), open questions (activity naming, GUID form, REPL vs subcommands, default-on), and a DAP-bridge follow-up for vscode-mdl.Docs-only; no code. Continues the proposal-driven workflow in
docs/11-proposals/.🤖 Generated with Claude Code
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