Snapshot WIP: solver HP epic progress, BPHX/HX physics, BMAD skill refresh.

Capture uncommitted solver robustness work (regularization, domain errors, linear solver lifecycle, tube DP/MSH), web workbench updates, and synced BMAD skills across IDE agent folders before starting BPHX pressure-drop.

Co-authored-by: Cursor <cursoragent@cursor.com>

.agent/skills/bmad-dev-auto/SKILL.md

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+---
+name: bmad-dev-auto
+description: 'One iteration of an unattended development loop. Use when invoked by name.'
+---
+
+# Dev Auto Workflow
+
+**Goal:** Turn intent into a hardened, reviewable artifact, without human interaction.
+
+**CRITICAL:** If a step says "read fully and follow step-XX", you read and follow step-XX. No exceptions.
+
+## HALT
+
+To HALT with a final status and optional blocking condition:
+
+1. If `{spec_file}` is known and exists, update `status` in frontmatter and append missing result details under `## Auto Run Result`.
+2. If `{spec_file}` is unknown or missing, create `{implementation_artifacts}/bmad-dev-auto-result-<slug-or-timestamp>.md` with:
+   ```markdown
+   ---
+   status: <final status>
+   ---
+
+   # BMad Dev Auto Result
+
+   Status: <final status>
+   Blocking condition: <blocking condition, if any>
+   ```
+3. Run: `python3 {project-root}/_bmad/scripts/resolve_customization.py --skill {skill-root} --key workflow.on_complete`
+4. If the resolved `workflow.on_complete` is non-empty, follow it as the final instruction before exiting.
+5. Stop the workflow.
+
+## Subagents
+
+Using subagents when instructed is mandatory. If you cannot, HALT with status `blocked` and blocking condition `no subagents`.
+
+Invoke every subagent **synchronously**: launch it, wait for it to return within the same turn, then continue with its result. When a step says to run subagents "in parallel" (e.g. the reviewers), that means several **blocking** calls awaited together in one turn — not detached execution. Never run a subagent in the background / detached / async (e.g. `run_in_background: true`), and never end your turn to "await a completion notification." This workflow runs unattended: there is no event loop to resume a yielded turn, so a backgrounded subagent never hands control back and the run stalls. The only sanctioned way to end a turn is the HALT protocol above with an explicit terminal `status`.
+
+## READY FOR DEVELOPMENT STANDARD
+
+A specification is "Ready for Development" when:
+
+- **Actionable**: Every task has a file path and specific action.
+- **Logical**: Tasks ordered by dependency.
+- **Testable**: All ACs use Given/When/Then.
+- **Complete**: No placeholders or TBDs.
+- **Sufficient**: No known requirement, acceptance, dependency, or implementation gaps remain unresolved.
+- **Coherent**: No unresolved ambiguities or internal contradictions.
+
+## Conventions
+
+- Bare paths (e.g. `step-01-clarify-and-route.md`) resolve from the skill root.
+- `{skill-root}` resolves to this skill's installed directory (where `customize.toml` lives).
+- `{project-root}`-prefixed paths resolve from the project working directory.
+- `{skill-name}` resolves to the skill directory's basename.
+
+## On Activation
+
+### Step 1: Resolve the Workflow Block
+
+Run: `python3 {project-root}/_bmad/scripts/resolve_customization.py --skill {skill-root} --key workflow`
+
+**If the script fails**, resolve the `workflow` block yourself by reading these three files in base → team → user order and applying the same structural merge rules as the resolver:
+
+1. `{skill-root}/customize.toml` — defaults
+2. `{project-root}/_bmad/custom/{skill-name}.toml` — team overrides
+3. `{project-root}/_bmad/custom/{skill-name}.user.toml` — personal overrides
+
+Any missing file is skipped. Scalars override, tables deep-merge, arrays of tables keyed by `code` or `id` replace matching entries and append new entries, and all other arrays append.
+
+### Step 2: Execute Prepend Steps
+
+Execute each entry in `{workflow.activation_steps_prepend}` in order before proceeding.
+
+### Step 3: Load Persistent Facts
+
+Treat every entry in `{workflow.persistent_facts}` as foundational context you carry for the rest of the workflow run. Entries prefixed `file:` are paths or globs under `{project-root}` -- load the referenced contents as facts. All other entries are facts verbatim.
+
+### Step 4: Load Config
+
+Load config from `{project-root}/_bmad/bmm/config.yaml` and resolve:
+
+- `project_name`, `planning_artifacts`, `implementation_artifacts`, `user_name`
+- `communication_language`, `document_output_language`, `user_skill_level`
+- `date` as system-generated current datetime
+- `project_context` = `**/project-context.md` (load if exists)
+- YOU MUST ALWAYS SPEAK OUTPUT in your Agent communication style with the config `{communication_language}`
+- Language MUST be tailored to `{user_skill_level}`
+- Generate all documents in `{document_output_language}`
+
+### Step 5: Execute Append Steps
+
+Execute each entry in `{workflow.activation_steps_append}` in order.
+
+Activation is complete after all activation steps have run.
+
+## Workflow Execution
+
+Follow the step files in order. Read one step fully, execute it, then load the next step only when directed. Do not skip, reorder, or pre-load steps.
+
+## First workflow step
+
+Read fully and follow: `./step-01-clarify-and-route.md` to begin the workflow.