feat: scaffold redsen-lean-harness v0.1.0

Recovered from crashed session (Node OOM). Repo contains full P0-P6
scaffold: plugin.json/marketplace.json, AGENTS.md, ADRs 0001-0006,
lh CLI (init/index/graph/lane/run/memory/host/report/doctor), 10
.github/agents, 12 CLI skills, instructions, context7 mcp.json, and
unit/e2e test suite.

Fixed: run.mjs read --in-tokens/--out-tokens but tests and CLI docs
use --input-tokens/--output-tokens, so telemetry totals were always 0.
Now accepts both forms.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.github/prompts/build.prompt.md

@@ -0,0 +1,12 @@
+---
+description: Run the lean harness build phase through the Conductor agent and Ralph lane loop.
+---
+
+# Build Prompt
+
+Invoke the `build` skill or `Conductor` agent.
+
+Run `lh host` first. Obey its strategy.
+Use parallel lanes only when host supports them.
+In VS Code, degrade to sequential lane execution.
+Keep Ralph loop and journal intact.

.github/prompts/design.prompt.md

@@ -0,0 +1,11 @@
+---
+description: Run the lean harness design gate through the Interrogator agent or design skill.
+---
+
+# Design Prompt
+
+Invoke the `design` skill or `Interrogator` agent.
+
+Use `.agents/specs/<slug>/questionnaire.md` and `.agents/specs/<slug>/decisions.md`.
+If VS Code cannot run parallel subagents, proceed sequentially.
+Stop until every required question is answered.

.github/prompts/fast-track.prompt.md

@@ -0,0 +1,12 @@
+---
+description: Run a small brownfield change through one lean harness lane without losing Ralph discipline.
+---
+
+# Fast Track Prompt
+
+Invoke the `fast-track` skill or `Conductor` agent.
+
+Use one lane.
+Skip full spec and DAG only when the change is small and bounded.
+Keep builder ⇄ verifier Ralph loop, `lh graph`, reviewer approval, and journal.
+In VS Code, run sequentially.

.github/prompts/onboard.prompt.md

@@ -0,0 +1,11 @@
+---
+description: Produce a concise lean harness onboarding summary from doctor, index, graph, and memory index.
+---
+
+# Onboard Prompt
+
+Invoke the `onboard` skill.
+
+Run `lh doctor`, `lh index --stats --budget 4000`, and `lh graph --brief`.
+Read only `.agents/memory/INDEX.md` by default.
+If VS Code cannot fan out scouts, inspect sequentially.