Issue 8-023: Fix Similarity Matrix Function Call in run.sh

Current Behavior (BEFORE FIX)

Running ./run.sh -I and selecting "Generate Similarity Matrix" failed with:

luajit: (command line):4: attempt to call field 'generate_similarity_matrix' (a nil value)
stack traceback:
        (command line):4: in main chunk
        [C]: at 0x5589399d0330
Error: Similarity matrix generation failed

The code in run.sh line 539 was:

sim.generate_similarity_matrix('$DIR/assets/poems.json', '$DIR/assets/embeddings/$model_dir_name')

Two problems:

1. Function generate_similarity_matrix does not exist
2. Parameters were wrong (poems file + directory instead of embeddings file + output file)

Intended Behavior

The similarity matrix should generate successfully when requested through run.sh.

Root Cause

The function in src/similarity-engine.lua is named calculate_similarity_matrix, not generate_similarity_matrix. Additionally, the signature is:

function M.calculate_similarity_matrix(embeddings_file, output_file, top_n, force_regenerate)

The call was passing:

• poems.json instead of embeddings.json
• Directory path instead of output file path

Fix Applied

Changed run.sh line 534-546 to:

sim.calculate_similarity_matrix(
    '$DIR/assets/embeddings/$model_dir_name/embeddings.json',
    '$DIR/assets/embeddings/$model_dir_name/similarity_matrix.json',
    nil,
    false
)

Files Modified

File	Change
run.sh	Fixed function name and parameters at lines 534-546

---

Phase: 8 (Website Completion)

Priority: High (blocking similarity matrix generation)

Created: 2026-01-04

Completed: 2026-01-04

Status: Completed

Type: Bug Fix