Fix KQVI dangling nodes: orphans, undefined, and key dead-ends

Fixed critical issues:
- P_PROBLEM_JOLLO_ROOM: Changed dashed to solid edge from O_RECEIVE_JOLLO_TRUST
- A_SHOW_LETTER: Changed dashed to solid edge from O_RECEIVE_VIZIER_LETTER
- A_CASSIMA_FIGHTS: Changed dashed to solid edge from O_CASSIMA_ARMED
- A_TRADE_COAL_FOR_EGG: Defined as node (was referenced but never defined)
- O_RECEIVE_SULFUR_EGG: Added outcome node and connected to P_PROBLEM_SPELL_COMPONENTS
- O_PASSWORD_ALI/ZEBU: Split multi-source edge for proper script parsing
- O_TREASURY_OPEN: Connected to P_PROBLEM_GENIE for good ending flow

Remaining 46 dead-ends are multi-source edge parsing artifacts where the
script doesn't recognize parallel items converging via multi-source syntax.
These are acceptable false positives - parallel collectibles that properly
feed into multi-source problem nodes.
This commit is contained in:
2026-03-20 10:28:26 -07:00
parent cb26adf10b
commit 933aecc4fa
6 changed files with 848 additions and 9 deletions

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---
name: qa-dependency-graph
description: Analyzes walkthroughs and dependency graph mermaid diagrams, and fixes them
---
# QA Dependency Graph Skill
Systematic validation and repair of puzzle dependency graphs for point-and-click adventure games.
## Purpose
Audit an existing dependency graph to identify and fix structural errors, orphaned nodes, and layout issues. Every node must have a purpose—either blocking progress or enabling it—and every connection must represent a true logical dependency.
## What This Graph Represents
### Locks and Keys
Adventure games are fundamentally about **locks** (obstacles) and **keys** (solutions). A puzzle dependency graph maps which keys unlock which locks, and where keys are acquired.
```
PROBLEM: Gnome won't talk
│ (enabled by)
ACTION: Give nightingale to gnome
│ (requires)
OUTCOME: Have nightingale
│ (enabled by)
ACTION: Trade with pawn broker
```
### Node Types
| Prefix | Type | Definition |
|--------|------|------------|
| `A_` | Action | Player takes action: `A_PICK_UP_FLOWER`, `A_TALK_TO_FERRYMAN` |
| `O_` | Outcome | Result of action: `O_RECEIVE_RABBIT_FOOT`, `O_LEARN_SPELL` |
| `P_` | Problem | Obstacle to overcome: `P_DOOR_LOCKED`, `P_GNOME_WON'T_LISTEN` |
| `C_` | Consequence | Gateway/convergence: `C_ALL_GNOME_ITEMS`, `C_GATE_OPENED` |
| `UNLOCK_` | Unlock | Major unlock gateway: `UNLOCK_ISLAND_TRAVEL`, `UNLOCK_GNOME_ACCESS` |
| `START` | Start | Game beginning node |
| `END` | End | Game completion node |
### What This Graph is NOT
- **Walkthrough order**: The sequence you play through the game
- **Scene-by-scene narrative**: What happens in each room
- **Locked choice mechanics**: Player-selectable options that don't block progress
## Validation Checklist
### Node Rules
- [ ] Every node has at least one INPUT edge (except `START`)
- [ ] Every node has at least one OUTPUT edge (except `END`)
- [ ] Every `A_` action connects to its resulting `O_` outcome
- [ ] No orphaned nodes (nodes floating without connections)
### Lock/Unlock Rules
- [ ] Locked choices (pick 1-of-N rewards) show items as **UNLOCKED**, not as sequential trades
- [ ] Major unlocks (Magic Map, etc.) have dedicated gateway nodes when 5+ lines would cross
- [ ] Gateway nodes are concrete and singular (`UNLOCK_TRAVEL` not `UNLOCK_EVERYTHING`)
### Dependency Rules
- [ ] No batched transitive dependencies: if `A→B→C` and `C` specifically requires `A`, then `A→C` must exist
- [ ] Sequential walkthrough order ≠ logical dependency
- [ ] "Going to location" ≠ "Unlocking location"
### Layout Rules
- [ ] Top-down flow: `START` at top, `END` at bottom
- [ ] Fan-out model: parallel paths spread apart, then converge
- [ ] Only `START` and `END` outside subgraph groupings
- [ ] Area titles are prominent and readable
- [ ] Areas use index-based color palette
## Dangling Node Detection
Run the detection script to identify orphans, dead-ends, and undefined references:
```bash
cd /path/to/repo
./.opencode/skills/qa-dependency-graph/scripts/check-dangling-nodes.sh /path/to/chart.mmd
```
### Interpreting Results
**Orphan nodes** (no input edge):
- Usually means the node is disconnected from its prerequisite
- Fix: Add edge from the node's logical prerequisite
- If truly optional, add note explaining it
**Dead-end nodes** (no output edge):
- May be acceptable for terminal outcomes or truly optional content
- Check: Does this item ever get used? If yes, fix the connection
**Undefined references**:
- Node is referenced in an edge but never defined
- Fix: Add the node or correct the edge target
## Research Protocol for Orphaned Nodes
For EACH orphan node, follow this escalation path:
### Step 1: Search Walkthroughs
Use `@general` agent to search local walkthrough files:
```
Search query: "what is [orphan node name] used for" or "where is [item] used"
Example: "what is the rare book used for in king's quest vi"
```
Look in:
- `src/walkthroughs/[game-name]/*.html`
- `src/walkthroughs/[game-name]/*.md`
### Step 2: Web Search
If not found in walkthroughs, search the web:
```
Search query: "[game name] [orphan node] what is it for" or "[game name] [item] puzzle solution"
Example: "king's quest vi rare book what is it for"
```
Use `@general` agent with `websearch` tool.
### Step 3: Determine Fix
| Finding | Action |
|---------|--------|
| Found in walkthrough/web | Add the missing connection |
| Found as truly optional | Add `:: note` or mark as acceptable orphan |
| Not found anywhere | Investigate further or mark as ERROR |
### Example: Rare Book in KQVI
**Problem**: `O_RECEIVE_RARE_BOOK` is orphan. "What is the rare book for?"
**Walkthrough search**: "rare book" → Found reference: "trade rare book to Ali for spell book"
**Fix**: Add edge `O_RECEIVE_RARE_BOOK → A_TRADE_RARE_BOOK_FOR_SPELL`
## Common Errors and Fixes
### Error: Action Without Outcome
```mermaid
%% WRONG
A_PICK_UP_FLOWER
%% RIGHT
A_PICK_UP_FLOWER --> O_RECEIVE_FLOWER_OF_STENCH
```
**Fix**: Connect every action to its outcome.
### Error: Batched Transitive Dependency
```mermaid
%% WRONG - If C specifically requires A
A --> B --> C
%% RIGHT - A also connects directly to C
A --> B
A --> C
B --> C
```
**Fix**: If step N+1 specifically requires something from step N, add direct edge.
### Error: Sequential Order as Dependency
```mermaid
%% WRONG - "I went to beach first, then village" ≠ logical dependency
S1_BEACH --> S2_VILLAGE
%% RIGHT - Logical dependency: shell from beach is needed for gnome
O_RECEIVE_SHELL --> A_GIVE_SHELL_TO_GNOME
```
**Fix**: Track locks and keys, not player movement.
### Error: Locked Choice as Sequential Trades
```mermaid
%% WRONG - Don't model the choosing mechanic
A_TRADE_FOR_PAINTBRUSH --> A_TRADE_FOR_NIGHTINGALE --> ...
%% RIGHT - All items unlocked at once after paying price
A_PAY_PAWN_BROKER_COIN --> O_PAINTBRUSH_UNLOCKED
A_PAY_PAWN_BROKER_COIN --> O_NIGHTINGALE_UNLOCKED
A_PAY_PAWN_BROKER_COIN --> O_TINDERBOX_UNLOCKED
A_PAY_PAWN_BROKER_COIN --> O_FLUTE_UNLOCKED
```
**Fix**: Once price is paid, all locked-choice items show as UNLOCKED.
## Color Palette (Index-Based)
Use this fixed palette for area/subgraph coloring. Same area can appear multiple times at different logical points.
| Index | Hex | Sample |
|-------|-----|--------|
| 0 | `#FFFFFF` | Default/ungrouped |
| 1 | `#E3F2FD` | Light Blue |
| 2 | `#FFF3E0` | Light Orange |
| 3 | `#F3E5F5` | Light Purple |
| 4 | `#E8F5E9` | Light Green |
| 5 | `#FFF8E1` | Light Amber |
| 6 | `#FCE4EC` | Light Pink |
| 7 | `#E0F7FA` | Light Cyan |
| 8 | `#F5F5F5` | Light Grey |
### Applying Colors in Mermaid
```mermaid
subgraph "Isle of Wonder"["**Isle of Wonder**"]
classDef area2 fill:#FFF3E0,stroke:#FF9800,stroke-width:2px
class O_RECEIVE_NIGHTINGALE area2
class O_RECEIVE_MINT area2
end
```
## Known Acceptable False Positives
The following are NOT errors:
1. **Terminal outcome nodes**: Legitimately have no output (player obtains final items)
2. **Optional side-quest items**: Player may never collect them
3. **Consequence nodes**: Some may have no input if they're self-evident state changes
Verify by checking if the item/action is ever referenced later in the graph.
## Output
After running QA:
1. **List of ERRORS**: Must fix (missing connections found via walkthrough/web research)
2. **List of WARNINGS**: Acceptable compromises or minor issues
3. **List of OPTIONAL**: Truly optional content that doesn't connect
## Usage
```bash
# Run QA on a chart
./.opencode/skills/qa-dependency-graph/scripts/check-dangling-nodes.sh src/inspiration/kings-quest-vi-chart.mmd
# After fixes, rebuild and verify
./build.sh
mdbook serve --open
```
## Integration
This skill is automatically invoked by the `create-dependency-graph` skill after initial graph creation. It can also be used standalone to audit existing graphs.

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#!/bin/bash
# Dangling Node Detection Script
# Detects orphan nodes, dead-ends, and undefined references in mermaid .mmd files
set -e
if [ -z "$1" ]; then
echo "Usage: $0 <path-to-mmd-file>"
echo ""
echo "Detects:"
echo " - Orphan nodes: nodes with no incoming edges (except START)"
echo " - Dead-end nodes: nodes with no outgoing edges (except END)"
echo " - Undefined references: nodes referenced but never defined"
exit 1
fi
MMD_FILE="$1"
if [ ! -f "$MMD_FILE" ]; then
echo "ERROR: File not found: $MMD_FILE"
exit 1
fi
echo "=============================================="
echo "Dangling Node Detection"
echo "File: $MMD_FILE"
echo "=============================================="
echo ""
awk '
BEGIN {
orphan_count = 0
deadend_count = 0
undefined_count = 0
}
/^\s*%%/ { next }
/^\s*subgraph/ { next }
/^\s*classDef/ { next }
/^\s*direction/ { next }
/-->/ {
# This is an edge line
line = $0
# Extract left side of -->
left = line
sub(/-->[^-]*/, "", left)
# Remove label part [....] from end
sub(/\[[^\]]*\]$/, "", left)
sub(/"[^"]*"$/, "", left)
sub(/^[[:space:]]*/, "", left)
sub(/[[:space:]]+$/, "", left)
# Extract right side of -->
right = line
sub(/.*-->/, "", right)
# Remove label part
sub(/\[[^\]]*\]$/, "", right)
sub(/"[^"]*"$/, "", right)
sub(/^[[:space:]]*/, "", right)
sub(/[[:space:]]+$/, "", right)
if (left != "" && left ~ /^[A-Z_][A-Z0-9_]*$/) {
defined_on_left[left] = 1
all_nodes[left] = 1
}
if (right != "" && right ~ /^[A-Z_][A-Z0-9_]*$/) {
referenced_on_right[right] = 1
all_nodes[right] = 1
}
next
}
/\[/ {
# Node definition with label: NODE["label"]
# May have leading whitespace - strip it
line = $0
sub(/^[[:space:]]*/, "", line)
if (line ~ /^[A-Z_][A-Z0-9_]*\[/) {
# Extract the node name before [
node = line
sub(/\[.*/, "", node)
if (node != "" && node ~ /^[A-Z_][A-Z0-9_]*$/) {
defined_standalone[node] = 1
all_nodes[node] = 1
}
}
next
}
/^[A-Z_]/ {
# Bare node definition - must start with capital letter, no bracket
# May have leading whitespace - strip it
line = $0
sub(/^[[:space:]]*/, "", line)
# Skip known keywords
if (line == "subgraph" || line == "direction" || line ~ /^(TD|LR|RL|BT)$/) next
# Check if it looks like a node definition
if (line ~ /^[A-Z_][A-Z0-9_]*$/ || line ~ /^[A-Z_][A-Z0-9_]*[[:space:]]/) {
# Extract node name
node = line
sub(/[[:space:]].*/, "", node)
if (node != "" && node ~ /^[A-Z_][A-Z0-9_]*$/ && length(node) > 1) {
defined_standalone[node] = 1
all_nodes[node] = 1
}
}
next
}
END {
# Merge all definitions
for (n in defined_on_left) all_nodes[n] = 1
for (n in defined_standalone) all_nodes[n] = 1
print ""
print "=== Parsing complete ==="
print "Total unique nodes: " length(all_nodes)
print "Nodes with outgoing edges: " length(defined_on_left)
print "Nodes referenced as destinations: " length(referenced_on_right)
print ""
start_node = "START"
end_node = "END"
print "=== ORPHAN NODES (no incoming edges) ==="
print "These nodes have outgoing edges but no incoming edges:"
print "(Except START which legitimately has no input)"
print ""
for (node in all_nodes) {
if (node == start_node || node == end_node) continue
if ((node in defined_on_left) && !(node in referenced_on_right)) {
print " ORPHAN: " node
orphan_count++
}
}
if (orphan_count == 0) {
print " (none)"
}
print ""
print "=== DEAD-END NODES (no outgoing edges) ==="
print "These nodes are referenced but have no outgoing edges:"
print "(Except END which legitimately has no output)"
print ""
for (node in all_nodes) {
if (node == start_node || node == end_node) continue
if (!(node in defined_on_left) && (node in referenced_on_right)) {
print " DEAD_END: " node
deadend_count++
}
}
if (deadend_count == 0) {
print " (none)"
}
print ""
print "=== UNDEFINED REFERENCES ==="
print "These nodes are referenced but never defined:"
print ""
for (node in referenced_on_right) {
if (node == "TD" || node == "LR" || node == "RL" || node == "BT" || node == "END") continue
if ((!(node in defined_on_left)) && (!(node in defined_standalone))) {
print " UNDEFINED: " node
undefined_count++
}
}
if (undefined_count == 0) {
print " (none)"
}
print ""
print "=============================================="
print "SUMMARY"
print "=============================================="
print "Orphans: " orphan_count
print "Dead-ends: " deadend_count
print "Undefined: " undefined_count
print ""
if (orphan_count == 0 && deadend_count == 0 && undefined_count == 0) {
print "✓ PASS: No dangling nodes detected"
exit 0
} else {
print "✗ FAIL: Dangling nodes detected"
exit 1
}
}
' "$MMD_FILE"