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Updated 10-15 23:46

About this skill

Decision Roadmap Generator

Reads accumulated raw entries from the knowledge vault and synthesizes them into a narrative decision roadmap — a document organized by decision threads rather than time periods. Each thread tells the story of a key decision: what triggered it, what was explored, what was chosen, what was abandoned, whether those abandonments still make sense, and which decisions were revised or superseded.

Unlike weekly/monthly reports (organized by calendar period) or git history (organized by code changes), the decision roadmap is organized by decision threads — chains of related entries that reveal how a project's thinking evolved.

Workflow

Step 0: Resolve Config and Scope

Resolve the vault path using the standard Lode config resolution. The bundled decision graph helper performs that resolution while building the derived index:

python <this-skill>/scripts/decision_graph.py build --cwd "$PWD"

If the helper cannot resolve config, resolve manually:

  1. Check .lode/config.yaml in project root
  2. Check ~/.lode/config.yaml
  3. Fall back to $WEEKLY_PPT_PATH or ~/.weekly-ppt/

Determine scope from the user's request:

  • Default: current project, all available weeks
  • Cross-project: if the user explicitly asks, read all {slug}.json files
  • Date range: if the user specifies (e.g. "from April", "last month"), filter accordingly

Step 1: Gather Raw Entries

Read all matching raw entry files:

{vault}/raw/weeks/{YYYY-WNN}/{slug}.json

Each file contains a JSON array of entries. Load all files in scope, flatten into a single list, and sort by timestamp ascending.

If {vault}/raw/artifacts/{slug}.json exists, load it as optional source navigation. Artifact index entries can provide document links and topic hints, but they must not create decision facts by themselves.

If no entries are found, tell the user and stop — there is nothing to build a roadmap from.

Step 2: Assess Decision Signal Strength

Every entry contributes to the roadmap, but with different signal strength. Classify each entry:

Strong signal — entries with explicit decision-recording fields:

  • motivation is present and non-empty
  • exploration_paths is present and non-empty
  • abandoned_alternatives is present and non-empty
  • open_questions is present and non-empty
  • type is decision

These entries directly state why something was done, what was tried, and what was rejected. Use their decision fields verbatim.

Medium signal — entries without decision-recording fields, but with rich summary and context that reveal decision logic. These are the most common case in real vaults — many projects have entries written before the decision-recording schema was introduced. Infer decision signals from:

  • summary describes what was built/changed → infer motivation from the "why" implicit in context
  • context explains why it was needed → extract trigger and outcome
  • type indicates the nature of the change → feature = new capability chosen, fix = problem-driven decision, refactor = structural decision, risk = identified concern
  • impact field (when present) → forward-looking consequence, useful for reassessment

Inference examples:

  • summary: "Added retry-with-repair loop to validation" + context: "Single-pass missed 3 failure patterns" → motivation: "Validation accuracy insufficient for production", exploration: ["single-pass → rejected (missed patterns)", "retry-with-repair → chosen"]
  • summary: "Switched from batch to per-episode rolling execution" + context: "Batch processing failed on long scripts" → motivation: "Batch mode couldn't handle script length variance", abandoned: ["batch processing for all episodes at once"]

Weak signal — entries with terse summary/context that only describe what changed without explaining why. These establish what was built. Use them as timeline markers and background context within threads, but don't force them into decision points.

Signal density check: After classification, if fewer than 30% of entries are strong-signal, the roadmap will rely heavily on inference. Note this in the document header: "Decision context inferred from {N}/{M} entries (explicit decision fields present in {N} entries)."

Step 2.5: Data Integrity Constraint

The roadmap must be derived from raw entries only. Do not:

  • Supplement with git history, commit logs, or external documents
  • Invent entries, timestamps, commit hashes, or technical details not present in the source data
  • Fabricate exploration paths or abandoned alternatives that aren't supported by the entries

If the raw entries are insufficient to build a meaningful thread, say so rather than filling gaps with invented content. A thin roadmap built from real data is more valuable than a rich roadmap built from assumptions.

Step 3: Identify Decision Threads

Group entries into decision threads. A thread connects entries that share a common theme, regardless of signal strength:

  • Same technical area (same module, component, or architectural concern mentioned in summary or context)
  • Exploration paths that reference each other's outcomes
  • Motivations that build on each other (later entry resolves earlier entry's open_questions)
  • Entries that describe successive iterations on the same problem

Strong-signal entries anchor each thread with explicit decision context. Medium-signal entries fill the timeline with inferred decision points. Weak-signal entries provide chronological context — what was built when, establishing the background against which decisions were made.

For each thread, extract:

Element Source
Title Capture the core decision area in 3-6 words
Timeline First to last entry timestamp
Trigger Original motivation (strong signal) or inferred from earliest entry's context (medium signal)
Decision points Key moments where a choice was made — from explicit exploration paths (strong) or from contrasting "what was" vs "what changed" (medium)
Exploration paths From exploration_paths field (strong) or inferred from before/after in summary+context (medium)
Abandoned alternatives From abandoned_alternatives field (strong) or from context describing rejected approaches (medium)
Current status Resolved / Ongoing / Has open questions

Cross-Referencing Artifact Index

When the artifact index exists at {vault}/raw/artifacts/{slug}.json:

  1. For each identified decision thread, check if any artifact index entries carry decision_threads that match.
  2. When an artifact links to a thread, include its title, path, and topics in the thread's supporting evidence.
  3. Artifacts with status: superseded or superseded_by may indicate decisions that have been revisited — flag these for the "Roadmap Correction" section.
  4. Do not create threads from artifact metadata alone. Artifacts can connect threads but cannot define them.

Thread Merge Suggestions

When the derived Decision Replay Index contains thread_merge_suggestions in its source block, review them before writing thread narratives. These are heuristically detected similar thread slugs that may represent the same decision domain. The agent should:

  1. Read the entries behind both threads
  2. Confirm whether they are genuinely the same domain
  3. Present the merge suggestion to the user
  4. After confirmation, use the suggested_merge slug in the roadmap narrative

Do not auto-merge threads without confirmation. If the evidence is ambiguous, keep the threads separate and note the possible relationship.

Also track lifecycle-like signals when entries explicitly support them:

  • revised decisions
  • superseded decisions
  • abandoned alternatives worth revisiting
  • stale open questions
  • accumulating risks
  • recurring open questions

Aim for 3-7 threads. If you find more, merge loosely related ones. If you find fewer than 3, the data may be too thin for a meaningful roadmap — say so and show what you can.

Mark inferred content: When decision points, exploration paths, or abandoned alternatives are inferred rather than directly sourced from entry fields, express them with hedging language ("likely motivated by", "appears the approach shifted from X to Y") rather than presenting inference as fact.

Step 4: Write the Roadmap

Before writing the human-readable roadmap, generate the Decision Replay Index from raw entries:

python <this-skill>/scripts/decision_graph.py build --cwd "$PWD"

This writes:

{vault}/raw/decisions/{slug}.json

The index schema is lode.decision_replay.v1 and contains: schema_version, project_slug, generated_at, source, nodes, and edges. Each node preserves source_entry_refs, confidence (explicit or inferred), decision, why, chosen, rejected, open_questions, impact, topic_keys, artifact_refs, evidence_refs, and thread_id. Edges are heuristic links between entries in the same thread or entries that share referenced artifacts. Raw entries remain the source of truth; artifact index data is navigation and edge-hint metadata only.

For a targeted agent query, use the same helper to return a compact evidence pack rather than asking the agent to read every raw entry:

python <this-skill>/scripts/decision_graph.py query "why did we choose the current validation boundary?" \
  --cwd "$PWD" --mode why --limit 5

The query helper reads {vault}/raw/decisions/{slug}.json when present and can rebuild an in-memory index from raw entries when the file is missing. It returns matching decision nodes, nearby supporting nodes, rejected alternatives, open questions, suggested docs, and missing-evidence notes. The host coding agent still writes the final answer; the helper only narrows and cites the evidence. For roadmap generation, use the deterministic decision-thread evidence pack before writing narrative sections:

python <this-skill>/scripts/decision_graph.py roadmap --cwd "$PWD" --limit-threads 20

Use that pack to ground thread narratives and cited decision points instead of reconstructing those links manually. Raw entries remain the source of truth.

Generate a Markdown document with this structure:

# Decision Roadmap — {project name}

> Generated {date} from {N} entries spanning {first-week} to {last-week}.
> {N} decision threads identified.
> Decision context: {N_strong} entries with explicit decision fields, {N_medium} inferred from summary/context, {N_weak} as background.

---

## Decision Timeline

```mermaid
timeline
    title {project} Decision Timeline
    section {YYYY-WNN}
        {Thread title}
        : {Key decision or outcome}
    section {YYYY-WNN}
        {Thread title}
        : {Key decision or outcome}

Thread: {Thread Title}

Timeline: {first-date} → {last-date} Status: Resolved | Ongoing | Open questions remaining

{2-4 sentence narrative: what triggered this thread, what was explored, what was chosen, and why. Write as a story, not a bullet list.}

Decision Points

Date Decision Trigger Outcome
{date} {what was decided} {what prompted it} {what happened as a result}

Exploration Paths

flowchart LR
    A[{Trigger}] --> B{Decision point}
    B -->|{Option 1}| C[{Outcome}]
    B -->|{Option 2}| D[{Outcome}]
    D -->|Rejected| E[{Reason}]
    C --> F[{Result}]
Approach Outcome Why
{approach} {chosen / rejected / deferred} {reason}

Abandoned Alternatives

  • {Alternative name} — {why it was rejected}. {Any conditions under which it should be reconsidered.}

Open Questions

  • {Question from open_questions field, or inferred from the thread}

{Repeat for each thread}

Reassessment of Abandoned Alternatives

For each abandoned alternative across all threads, reassess with current knowledge:

Alternative When Original Reason Still Valid? Revisit Trigger
{name} {date} {why abandoned} Yes / Partially / No {what would make it worth reconsidering}

Roadmap Correction

Use this section when current evidence suggests a prior abandonment, decision, or open question should be revisited. Every correction must cite raw-entry evidence and label inferred conclusions.

Accumulating Risks

List risks that appear across multiple entries, remain unresolved, or become more consequential over time. Each item must cite source timestamps and say whether the risk is explicit or inferred.

Risk Evidence Current Pressure Suggested Review
{risk} {timestamps} low / medium / high {what to inspect next}

Recurring Open Questions

Group repeated or long-lived open questions by decision thread. Omit this section if there are no supported recurring questions.

Question First Seen Repeated In Why It Matters
{question} {timestamp} {timestamps} {planning or architecture impact}

Open Questions Inventory

All unresolved questions across threads, organized by urgency:

Active (needs resolution soon)

  • {question} — from {thread}, open since {date}

Deferred (no immediate pressure)

  • {question} — from {thread}, open since {date}

Resolved since last roadmap

  • {question} — resolved in {entry summary}

### Writing Guidelines

**Narrative tone**: Write as a colleague explaining the project's journey to someone who wasn't there. Second person is fine ("we explored", "we chose"). Be specific about technical details — vague abstractions defeat the purpose.

**Decision points table**: Each row should be a meaningful fork in the road, not every entry. Ask: "did this change the project's direction?" If yes, it's a decision point.

**Mermaid diagrams**:
- Use `timeline` for the overview — one entry per thread per week where something happened
- Use `flowchart LR` for exploration paths within a thread — show the branching and where each path led
- Keep diagrams readable: max 8-10 nodes per flowchart. If a thread has more decision points, split into sub-diagrams.
- For inferred exploration paths (not from explicit `exploration_paths` field), use dashed-style arrows or add "?" to the node label to distinguish inference from explicit data

**Reassessment**: This is the highest-value section. For each abandoned alternative, honestly evaluate whether the original rejection reason still holds. The goal is to surface forgotten viable approaches — that's the Phase 3 validation criterion. When alternatives were inferred rather than explicitly recorded, note this: "Inferred alternative — original rejection reason reconstructed from context."

**Roadmap correction**: Include revised/superseded decisions and alternatives
worth revisiting. Do not invent corrections from artifact titles alone; artifact
index is source navigation only.

**Accumulating risks and recurring questions**: This absorbs the useful part of
hard-stuff radar. Only include a risk or question when supported by raw entries.
Use "inferred" language when grouping is based on similarity rather than an
explicit repeated label.

**Inference transparency**: The roadmap mixes explicit decision data with inferred signals. Readers need to know which is which. Use these conventions:
- Decision points from explicit fields: stated as fact
- Decision points inferred from summary/context: "appears to have been motivated by..." or "likely driven by..."
- Exploration paths from explicit fields: stated as fact
- Exploration paths inferred from before/after: "the approach evolved from X to Y, suggesting..."

### Step 5: Output

Save the roadmap to the vault:

{vault}/Work Diary/Decision Roadmap.md


If scoped to a date range:

{vault}/Work Diary/Decision Roadmap - {start} to {end}.md


If the vault path cannot be resolved, output the roadmap directly to the conversation and tell the user to run `/lode:cold-start-interview` for persistent roadmap memory.

This skill does **not** write a raw entry side effect. The decision roadmap is a reading/synthesis activity — it consumes entries, it doesn't produce new decision signals. The roadmap itself is the deliverable.
The Decision Replay Index is a derived raw-layer index, not a new historical
raw entry.

## Configuration

Uses the unified Lode configuration system. Same resolution order as other skills:

| Priority | Location | Scope |
|----------|----------|-------|
| 1 | `.lode/config.yaml` (project root) | Project-level override |
| 2 | `~/.lode/config.yaml` | Global default |
| 3 | `$WEEKLY_PPT_PATH` env var | Legacy fallback |
| 4 | `~/.weekly-ppt/` | Legacy fallback default |

## Shared Storage Convention

The skill reads raw entries following the schema in `references/weekly-ppt-convention.md`.
It produces a Markdown document in the vault's wiki layer and may refresh
`{vault}/raw/decisions/{slug}.json` as a derived decision replay index. It does
not write new historical raw entries.