A single Granite Switch checkpoint built on ibm-granite/granite-4.0-350m with three task LoRA adapters embedded in one model. Each adapter is activated by a control token, so one deployed checkpoint serves three different tasks — no adapter swapping, no separate model loads.

This is the multi-adapter companion to the single-adapter barha/granite-switch-4.0-350m-cti.

Embedded adapters

#	Adapter	Control token	Task	Source LoRA
1	`cti-technique-mapping`	`<\|cti-technique-mapping\|>`	Map a CTI description → MITRE ATT&CK technique ID	barha/granite-cti-technique-mapping-350m-lora
2	`text-to-json`	`<\|text-to-json\|>`	Natural language + schema → schema-conforming JSON	barha/granite-text-to-json-350m-lora
3	`genai-attack-vector`	`<\|genai-attack-vector\|>`	Classify a GenAI security incident into 1 of 14 attack-vector classes	barha/granite-genai-attack-vector-350m-lora

All three adapters share an identical LoRA shape (rank 16, alpha 32, on the fused q/k/v/o attention projections and the input_linear / output_linear MLP projections), which is what lets them stack cleanly into one switch checkpoint.

Control token IDs: 100352, 100353, 100354 (3 new tokens; vocab 100355).

Per-adapter evaluation (on granite-4.0-350m)

Adapter	Metric	Score	n
text-to-json	Key-F1 (headline)	98.4	2000
genai-attack-vector	Accuracy	74.8% (166/222)	222
cti-technique-mapping	—	see source repo	—

These are the standalone scores of each source LoRA; embedding them in the switch does not change adapter weights.

How adapter selection works

Granite Switch routes per request via the control token: place the adapter's control token in the prompt (the chat template handles placement) and the switch activates that adapter for the turn. With no control token, the base model runs unmodified.

Usage

Compose / inference follow the standard Granite Switch flow — see the granite-switch repo and its tutorials. The checkpoint loads as a GraniteSwitchForCausalLM; adapter_index.json lists the adapter → control-token mapping and io_configs/<adapter>/io.yaml carries each adapter's I/O contract.

Build

Composed with granite_switch.composer.compose_granite_switch:

bash

python -m granite_switch.composer.compose_granite_switch \
  --base-model ibm-granite/granite-4.0-350m \
  --technology lora \
  --adapters cti-technique-mapping text-to-json genai-attack-vector \
  --output ./granite-switch-4.0-350m-demo

Base params 352M → composed 359M (+2.0%). See BUILD.md and compose_report.json in this repo for the full composition report.

License: Apache-2.0

barha/granite-switch-4.0-350m-demo

Granite Switch 4.0 350M — 3-Adapter Demo

Embedded adapters

Per-adapter evaluation (on granite-4.0-350m)

How adapter selection works

Usage

Build

barha/
granite-switch-4.0-350m-demo