diff --git a/api/types.go b/api/types.go
index d7a2a0f6e..0a34ac905 100644
--- a/api/types.go
+++ b/api/types.go
@@ -718,6 +718,9 @@ type CreateRequest struct {
 	// Requires is the minimum version of Ollama required by the model.
 	Requires string `json:"requires,omitempty"`
 
+	// Capabilities adds to the model's inherited or inferred capabilities.
+	Capabilities []string `json:"capabilities,omitempty"`
+
 	// Info is a map of additional information for the model
 	Info map[string]any `json:"info,omitempty"`
 
diff --git a/cmd/create_safetensors.go b/cmd/create_safetensors.go
index e9b276590..a4e1a375d 100644
--- a/cmd/create_safetensors.go
+++ b/cmd/create_safetensors.go
@@ -21,15 +21,16 @@ import (
 
 // modelfileConfig holds configuration extracted from a Modelfile.
 type modelfileConfig struct {
-	Template   string
-	System     string
-	Licenses   []string
-	Draft      string
-	Parser     string
-	Renderer   string
-	Requires   string
-	Parameters map[string]any
-	Messages   []api.Message
+	Template     string
+	System       string
+	Licenses     []string
+	Draft        string
+	Parser       string
+	Renderer     string
+	Requires     string
+	Capabilities []string
+	Parameters   map[string]any
+	Messages     []api.Message
 }
 
 var ignoredModelfileParameters = []string{
@@ -66,6 +67,11 @@ func configFromModelfile(modelfile *parser.Modelfile) (string, *modelfileConfig,
 			mfConfig.Parser = cmd.Args
 		case "renderer":
 			mfConfig.Renderer = cmd.Args
+		case "capability":
+			if !model.Capability(cmd.Args).IsValid() {
+				return "", nil, fmt.Errorf("unknown capability: %q", cmd.Args)
+			}
+			mfConfig.Capabilities = append(mfConfig.Capabilities, cmd.Args)
 		case "requires":
 			requires := cmd.Args
 			if !strings.HasPrefix(requires, "v") {
@@ -364,6 +370,7 @@ func newManifestWriter(opts createOptions) create.ManifestWriter {
 	var license any
 	var parameters map[string]any
 	var messages []api.Message
+	var capabilities []string
 	if opts.Modelfile != nil {
 		template = opts.Modelfile.Template
 		system = opts.Modelfile.System
@@ -373,14 +380,16 @@ func newManifestWriter(opts createOptions) create.ManifestWriter {
 		draftDir = opts.Modelfile.Draft
 		parameters = opts.Modelfile.Parameters
 		messages = opts.Modelfile.Messages
+		capabilities = opts.Modelfile.Capabilities
 	}
 	return create.NewSafetensorsManifestWriter(create.SafetensorsManifestOptions{
-		MinVersion: create.SafetensorsMinOllamaVersion,
-		DraftDir:   draftDir,
-		Template:   template,
-		System:     system,
-		License:    license,
-		Parameters: parameters,
-		Messages:   messages,
+		MinVersion:   create.SafetensorsMinOllamaVersion,
+		DraftDir:     draftDir,
+		Template:     template,
+		System:       system,
+		License:      license,
+		Parameters:   parameters,
+		Messages:     messages,
+		Capabilities: capabilities,
 	})
 }
diff --git a/cmd/create_safetensors_remote.go b/cmd/create_safetensors_remote.go
index 2db47bf36..f3ca59186 100644
--- a/cmd/create_safetensors_remote.go
+++ b/cmd/create_safetensors_remote.go
@@ -287,6 +287,7 @@ func newRemoteCreateRequest(opts createOptions, files []remoteSourceFile) *api.C
 		req.System = opts.Modelfile.System
 		req.Parameters = opts.Modelfile.Parameters
 		req.Messages = opts.Modelfile.Messages
+		req.Capabilities = opts.Modelfile.Capabilities
 		if len(opts.Modelfile.Licenses) > 0 {
 			req.License = opts.Modelfile.Licenses
 		}
diff --git a/cmd/create_safetensors_remote_test.go b/cmd/create_safetensors_remote_test.go
index 72bfdae7e..71bf59f00 100644
--- a/cmd/create_safetensors_remote_test.go
+++ b/cmd/create_safetensors_remote_test.go
@@ -127,14 +127,15 @@ func TestNewRemoteCreateRequest(t *testing.T) {
 		Quantize:      "nvfp4",
 		DraftQuantize: "mxfp8",
 		Modelfile: &modelfileConfig{
-			Template:   "{{ .Prompt }}",
-			System:     "system",
-			Licenses:   []string{"MIT", "Apache-2.0"},
-			Parser:     "mf-parser",
-			Renderer:   "mf-renderer",
-			Requires:   "0.20.0",
-			Parameters: map[string]any{"temperature": float32(0.1)},
-			Messages:   []api.Message{{Role: "user", Content: "hello"}},
+			Template:     "{{ .Prompt }}",
+			System:       "system",
+			Licenses:     []string{"MIT", "Apache-2.0"},
+			Parser:       "mf-parser",
+			Renderer:     "mf-renderer",
+			Requires:     "0.20.0",
+			Capabilities: []string{"decision"},
+			Parameters:   map[string]any{"temperature": float32(0.1)},
+			Messages:     []api.Message{{Role: "user", Content: "hello"}},
 		},
 	}, []remoteSourceFile{
 		{logical: "config.json", digest: "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"},
@@ -155,6 +156,9 @@ func TestNewRemoteCreateRequest(t *testing.T) {
 	if req.Requires != "0.20.0" {
 		t.Fatalf("Requires = %q, want 0.20.0", req.Requires)
 	}
+	if !slices.Equal(req.Capabilities, []string{"decision"}) {
+		t.Fatalf("Capabilities = %v, want decision", req.Capabilities)
+	}
 	if licenses, ok := req.License.([]string); !ok || !slices.Equal(licenses, []string{"MIT", "Apache-2.0"}) {
 		t.Fatalf("License = %#v, want both licenses", req.License)
 	}
diff --git a/cmd/create_safetensors_test.go b/cmd/create_safetensors_test.go
index 78a587510..3c94b1f0f 100644
--- a/cmd/create_safetensors_test.go
+++ b/cmd/create_safetensors_test.go
@@ -108,6 +108,8 @@ LICENSE MIT
 LICENSE Apache-2.0
 PARSER test-parser
 RENDERER test-renderer
+CAPABILITY decision
+CAPABILITY tools
 REQUIRES 0.20.0
 MESSAGE user Hello
 PARAMETER temperature 0.7
@@ -131,14 +133,15 @@ PARAMETER stop ASSISTANT:
 		t.Fatalf("CreateRequest license = %#v, want []string", req.License)
 	}
 	want := &modelfileConfig{
-		Template:   req.Template,
-		System:     req.System,
-		Licenses:   licenses,
-		Parser:     req.Parser,
-		Renderer:   req.Renderer,
-		Requires:   req.Requires,
-		Parameters: req.Parameters,
-		Messages:   req.Messages,
+		Template:     req.Template,
+		System:       req.System,
+		Licenses:     licenses,
+		Parser:       req.Parser,
+		Renderer:     req.Renderer,
+		Requires:     req.Requires,
+		Parameters:   req.Parameters,
+		Messages:     req.Messages,
+		Capabilities: req.Capabilities,
 	}
 	if modelDir != req.From {
 		t.Fatalf("model source = %q, want %q", modelDir, req.From)
@@ -148,6 +151,15 @@ PARAMETER stop ASSISTANT:
 	}
 }
 
+func TestConfigFromModelfileRejectsUnknownCapability(t *testing.T) {
+	for _, capability := range []string{"", "system-one", "decision tools"} {
+		mf := &parser.Modelfile{Commands: []parser.Command{{Name: "capability", Args: capability}}}
+		if _, _, err := configFromModelfile(mf); err == nil || !strings.Contains(err.Error(), "unknown capability") {
+			t.Fatalf("capability %q: got %v, want unknown capability", capability, err)
+		}
+	}
+}
+
 func TestConfigFromModelfilePreservesRequiresBelowSafetensorsMinimum(t *testing.T) {
 	modelfile, err := parser.ParseFile(strings.NewReader(`
 FROM ./model
@@ -421,6 +433,7 @@ func TestNewManifestWriter_PopulatesFileTypeFromEffectiveQuantize(t *testing.T)
 	opts := createOptions{
 		ModelName: "test-quantized",
 		ModelDir:  t.TempDir(),
+		Modelfile: &modelfileConfig{Capabilities: []string{"decision", "completion", "decision"}},
 	}
 
 	writer := newManifestWriter(opts)
@@ -456,6 +469,9 @@ func TestNewManifestWriter_PopulatesFileTypeFromEffectiveQuantize(t *testing.T)
 	if cfg.FileType != "mxfp8" {
 		t.Fatalf("FileType = %q, want %q", cfg.FileType, "mxfp8")
 	}
+	if want := []string{"completion", "decision"}; !slices.Equal(cfg.Capabilities, want) {
+		t.Fatalf("Capabilities = %v, want %v", cfg.Capabilities, want)
+	}
 }
 
 func TestNewManifestWriterPreservesMultipleLicenses(t *testing.T) {
diff --git a/create/manifest.go b/create/manifest.go
index 76ebe7855..ba3adc1eb 100644
--- a/create/manifest.go
+++ b/create/manifest.go
@@ -32,11 +32,12 @@ type SafetensorsManifestOptions struct {
 	MinVersion string
 	DraftDir   string
 
-	Template   string
-	System     string
-	License    any
-	Parameters map[string]any
-	Messages   []api.Message
+	Template     string
+	System       string
+	License      any
+	Parameters   map[string]any
+	Messages     []api.Message
+	Capabilities []string
 
 	BeforeWriteManifest func()
 }
@@ -64,6 +65,7 @@ func NewSafetensorsManifestWriter(opts SafetensorsManifestOptions) ManifestWrite
 		}
 
 		config := info.ModelConfig
+		config.AddCapabilities(opts.Capabilities...)
 		config.ModelFormat = "safetensors"
 		if config.Requires == "" {
 			config.Requires = opts.MinVersion
diff --git a/docs/modelfile.mdx b/docs/modelfile.mdx
index 1c6ef590e..72c8cb434 100644
--- a/docs/modelfile.mdx
+++ b/docs/modelfile.mdx
@@ -20,6 +20,7 @@ A Modelfile is the blueprint to create and share customized models using Ollama.
   - [SYSTEM](#system)
   - [LICENSE](#license)
   - [MESSAGE](#message)
+  - [CAPABILITY](#capability)
 - [Notes](#notes)
 
 ## Format
@@ -40,6 +41,7 @@ INSTRUCTION arguments
 | [`LICENSE`](#license)               | Specifies the legal license.                                   |
 | [`MESSAGE`](#message)               | Specify message history.                                       |
 | [`REQUIRES`](#requires)             | Specify the minimum version of Ollama required by the model.   |
+| [`CAPABILITY`](#capability)         | Declare an additional model capability.                       |
 
 ## Examples
 
@@ -221,6 +223,14 @@ MESSAGE user Is Ontario in Canada?
 MESSAGE assistant yes
 ```
 
+### CAPABILITY
+
+Adds a capability to a GGUF or MLX model without removing inherited or inferred capabilities. Repeat the instruction to add more than one. Declare `decision` only for weights trained for System One's decision prompts:
+
+```
+CAPABILITY decision
+```
+
 ### REQUIRES
 
 The `REQUIRES` instruction allows you to specify the minimum version of Ollama required by the model.
diff --git a/docs/openapi.yaml b/docs/openapi.yaml
index eac5f3dc9..874a196a0 100644
--- a/docs/openapi.yaml
+++ b/docs/openapi.yaml
@@ -550,6 +550,11 @@ components:
         requires:
           type: string
           description: Minimum Ollama version required by the model
+        capabilities:
+          type: array
+          items:
+            type: string
+          description: Capabilities to add without removing inherited or inferred capabilities (e.g. `decision` for compatible decision models)
         stream:
           type: boolean
           default: true
diff --git a/integration/reg_groups_test.go b/integration/reg_groups_test.go
index 3a2f86563..8306d6f40 100644
--- a/integration/reg_groups_test.go
+++ b/integration/reg_groups_test.go
@@ -39,6 +39,7 @@ func TestAPI(t *testing.T) {
 		"api-show-model",
 		"generate-logprobs",
 		"chat-logprobs",
+		"system-one",
 	)
 }
 
diff --git a/integration/reg_release_test.go b/integration/reg_release_test.go
index 893b6c828..35e4bcdc0 100644
--- a/integration/reg_release_test.go
+++ b/integration/reg_release_test.go
@@ -79,6 +79,8 @@ func init() {
 		integrationTestCase("api-show-model", "llama3.2", runAPIShowModel),
 		integrationTestCase("generate-logprobs", smol, runAPIGenerateLogprobs),
 		integrationTestCase("chat-logprobs", smol, runAPIChatLogprobs),
+		// Keep the public tag so manifest lists select the platform's model.
+		integrationModelTestCase("system-one", defaultTestModel("nimble:latest"), runAPISystemOne),
 
 		integrationTestCase("blue-sky", smol, runBlueSky),
 		integrationModelTestCase("unicode-input", releaseUnicodeInputModel.Name, runUnicode),
diff --git a/integration/systemone_test.go b/integration/systemone_test.go
new file mode 100644
index 000000000..573f7a5ac
--- /dev/null
+++ b/integration/systemone_test.go
@@ -0,0 +1,205 @@
+//go:build integration && release
+
+package integration
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"math"
+	"net/http"
+	"slices"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+	"github.com/google/go-cmp/cmp/cmpopts"
+	"github.com/ollama/ollama/api"
+	"github.com/ollama/ollama/decision"
+	"github.com/ollama/ollama/types/model"
+)
+
+func postSystemOne(ctx context.Context, endpoint string, input decision.Request) ([]byte, int, error) {
+	body, err := json.Marshal(input)
+	if err != nil {
+		return nil, 0, err
+	}
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, "http://"+endpoint+"/v1/systemone", bytes.NewReader(body))
+	if err != nil {
+		return nil, 0, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, 0, err
+	}
+	defer resp.Body.Close()
+	body, err = io.ReadAll(io.LimitReader(resp.Body, 1<<20))
+	return body, resp.StatusCode, err
+}
+
+func runAPISystemOne(t *testing.T, modelName string) {
+	ctx, cancel := context.WithTimeout(t.Context(), apiTestTimeout)
+	defer cancel()
+	client, endpoint, cleanup := InitServerConnection(ctx, t)
+	defer cleanup()
+	if err := PullIfMissing(ctx, client, modelName); err != nil {
+		t.Fatal(err)
+	}
+	info, err := client.Show(ctx, &api.ShowRequest{Model: modelName})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !slices.Contains(info.Capabilities, model.CapabilityDecision) {
+		t.Fatalf("model %q does not declare the decision capability", modelName)
+	}
+
+	var input decision.Request
+	if err := json.Unmarshal([]byte(`{
+		"state":"Returns are allowed within 30 days. This item was bought 12 days ago. It arrived undamaged.",
+		"questions":{
+			"eligible":{"type":"noul","instructions":"Is this item within the store return window?","criteria":{}},
+			"department":{"type":"choice","instructions":"Which department handles a return?","criteria":{"returns":"Product returns and refunds","technical":"Software installation"}},
+			"damage":{"type":"score","instructions":"How damaged was the item?","criteria":["Undamaged","Minor damage","Destroyed"]}
+		}
+	}`), &input); err != nil {
+		t.Fatal(err)
+	}
+	input.Model = modelName
+	type response struct {
+		Model   string
+		Answers struct {
+			Eligible   decision.NoulAnswer
+			Department decision.ChoiceAnswer
+			Damage     decision.ScoreAnswer
+		}
+		Usage decision.Usage
+	}
+	score := func(t *testing.T, req decision.Request) response {
+		t.Helper()
+		body, status, err := postSystemOne(ctx, endpoint, req)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if status != http.StatusOK {
+			t.Fatalf("System One returned HTTP %d: %s", status, body)
+		}
+		// Missing or null numbers must not pass as legitimate zero values.
+		result := response{Usage: decision.Usage{InputTokens: -1, OutputTokens: -1}}
+		result.Answers.Eligible.Noul = math.NaN()
+		result.Answers.Department.Confidence = math.NaN()
+		result.Answers.Damage = decision.ScoreAnswer{Score: math.NaN(), Confidence: math.NaN()}
+		if err := json.Unmarshal(body, &result); err != nil {
+			t.Fatalf("decode System One response: %v: %s", err, body)
+		}
+		if result.Model != modelName {
+			t.Fatalf("unexpected model or answer fields: %s", body)
+		}
+		// MLX scores without generating; llama.cpp can report primer/answer
+		// tokens. Neither backend may omit input accounting or report negatives.
+		if result.Usage.InputTokens <= 0 || result.Usage.OutputTokens < 0 {
+			t.Fatalf("missing or invalid usage: %s", body)
+		}
+		answers := result.Answers
+		if answers.Eligible.Type != "noul" || answers.Department.Type != "choice" || answers.Damage.Type != "score" {
+			t.Fatalf("unexpected answer types: %s", body)
+		}
+		for _, answer := range []struct {
+			name          string
+			probabilities *decision.Probabilities
+			confidence    float64
+			keys          []string
+		}{
+			{"department", answers.Department.Probabilities, answers.Department.Confidence, []string{"returns", "technical"}},
+			{"damage", answers.Damage.Probabilities, answers.Damage.Confidence, []string{"0", "1", "2"}},
+		} {
+			if answer.probabilities.Len() != len(answer.keys) {
+				t.Fatalf("%s probabilities: got %v, want keys %v", answer.name, answer.probabilities, answer.keys)
+			}
+			var sum float64
+			for _, key := range answer.keys {
+				p, ok := answer.probabilities.Get(key)
+				if !ok || !(p >= 0 && p <= 1) {
+					t.Fatalf("%s probability %q missing or invalid: %s", answer.name, key, body)
+				}
+				sum += p
+			}
+			if math.Abs(sum-1) > 1e-6 || !(answer.confidence >= 0 && answer.confidence <= 1) {
+				t.Fatalf("%s: probability sum=%v or missing/invalid confidence: %s", answer.name, sum, body)
+			}
+		}
+		if p := answers.Eligible.Noul; !(p >= 0 && p <= 1) {
+			t.Fatalf("missing or invalid eligible probability: %s", body)
+		}
+		if value := answers.Damage.Score; !(value >= 0 && value <= 2) {
+			t.Fatalf("missing or invalid damage score: %s", body)
+		}
+		if diff := cmp.Diff(map[string]string{"0": "Undamaged", "1": "Minor damage", "2": "Destroyed"}, answers.Damage.Legend.ToMap()); diff != "" {
+			t.Fatalf("damage legend (-want +got):\n%s", diff)
+		}
+		return result
+	}
+
+	baseline := score(t, input)
+	t.Run("decisions", func(t *testing.T) {
+		if baseline.Answers.Eligible.Noul <= 0.5 || baseline.Answers.Department.Choice != "returns" || baseline.Answers.Damage.Score >= 0.5 {
+			t.Fatalf("unexpected decisions for an undamaged, in-window return: %+v", baseline.Answers)
+		}
+		late := input
+		late.State = json.RawMessage(`"Returns are allowed within 30 days. This item was bought 90 days ago. It arrived undamaged."`)
+		if result := score(t, late); result.Answers.Eligible.Noul >= 0.5 {
+			t.Fatalf("late return should be ineligible: %+v", result.Answers.Eligible)
+		}
+	})
+
+	unchanged := func(t *testing.T) {
+		t.Helper()
+		got := score(t, input)
+		// Cache/prefill shapes can change BF16 accumulation. Match the runner
+		// parity test's 0.01 absolute tolerance while requiring identical choices.
+		if diff := cmp.Diff(baseline.Answers, got.Answers, cmpopts.EquateApprox(0, 0.01),
+			cmpopts.AcyclicTransformer("probabilities", (*decision.Probabilities).ToMap),
+			cmpopts.AcyclicTransformer("legend", (*decision.Legend).ToMap),
+		); diff != "" {
+			t.Errorf("scoring changed (-baseline +got):\n%s", diff)
+		}
+		if got.Usage.InputTokens != baseline.Usage.InputTokens {
+			t.Errorf("input token count changed: got %d, want %d", got.Usage.InputTokens, baseline.Usage.InputTokens)
+		}
+	}
+	t.Run("repeat", unchanged)
+	t.Run("concurrent", func(t *testing.T) {
+		for i := range 4 {
+			t.Run(fmt.Sprint(i), func(t *testing.T) {
+				t.Parallel()
+				unchanged(t)
+			})
+		}
+	})
+	t.Run("after_generation", func(t *testing.T) {
+		noStream := false
+		err := client.Generate(ctx, &api.GenerateRequest{
+			Model: modelName, Prompt: "Reply with one word: hello", Stream: &noStream,
+			Think:   &api.ThinkValue{Value: false},
+			Options: map[string]any{"temperature": 0, "num_predict": 8},
+		}, func(api.GenerateResponse) error { return nil })
+		if err != nil {
+			t.Fatal(err)
+		}
+		unchanged(t)
+	})
+
+	t.Run("invalid_state", func(t *testing.T) {
+		invalid := input
+		invalid.State = json.RawMessage(`""`)
+		body, status, err := postSystemOne(ctx, endpoint, invalid)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if status != http.StatusBadRequest {
+			t.Fatalf("got HTTP %d, want %d: %s", status, http.StatusBadRequest, body)
+		}
+		unchanged(t)
+	})
+}
diff --git a/mlxrunner/client_score_test.go b/mlxrunner/client_score_test.go
index 594ef0ff6..9a82dbd2b 100644
--- a/mlxrunner/client_score_test.go
+++ b/mlxrunner/client_score_test.go
@@ -75,3 +75,26 @@ func TestClientScoreTransportError(t *testing.T) {
 		})
 	}
 }
+
+func TestClientScoreCancellation(t *testing.T) {
+	started := make(chan struct{})
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		_, _ = io.Copy(io.Discard, r.Body)
+		close(started)
+		<-r.Context().Done()
+	}))
+	defer srv.Close()
+	client := &Client{port: srv.Listener.Addr().(*net.TCPAddr).Port, client: srv.Client()}
+	ctx, cancel := context.WithCancel(t.Context())
+	defer cancel()
+	done := make(chan error, 1)
+	go func() {
+		_, err := client.Score(ctx, llm.ScoreRequest{})
+		done <- err
+	}()
+	<-started
+	cancel()
+	if err := <-done; !errors.Is(err, context.Canceled) {
+		t.Fatalf("got %v, want context cancellation", err)
+	}
+}
diff --git a/mlxrunner/model/qwen3_5/score_test.go b/mlxrunner/model/qwen3_5/score_test.go
index dc592df26..af1e90b7c 100644
--- a/mlxrunner/model/qwen3_5/score_test.go
+++ b/mlxrunner/model/qwen3_5/score_test.go
@@ -42,3 +42,38 @@ func TestUnembedCandidates(t *testing.T) {
 		})
 	})
 }
+
+func TestUnembedQuantizedCandidates(t *testing.T) {
+	for _, mode := range []string{"affine", "nvfp4"} {
+		mlxtest.RunSubtest(t, mode, func(t *mlxtest.T) {
+			mlx.Scoped(func() {
+				values := make([]float32, 32*64)
+				for i := range values {
+					values[i] = float32(math.Sin(float64(i)))
+				}
+				weight := mlx.FromValues(values, 32, 64).AsType(mlx.DTypeBFloat16)
+				groupSize := 64
+				if mode == "nvfp4" {
+					groupSize = 16
+				}
+				bias := mlx.FromValues(values[:32], 32).AsType(mlx.DTypeBFloat16)
+				head := nn.NewQuantizedLinear(weight, bias, groupSize, 4, mode)
+				if mode == "nvfp4" {
+					head.GlobalScale = mlx.FromValues([]float32{0.5}, 1)
+				}
+				m := &Model{LMHead: head}
+				hidden := mlx.FromValues(values[:64], 1, 1, 64).AsType(mlx.DTypeBFloat16)
+				ids := mlx.FromValues([]int32{31, 2, 0}, 3)
+				got := m.UnembedCandidates(hidden, ids).AsType(mlx.DTypeFloat32)
+				want := m.Unembed(hidden).Reshape(-1).TakeAxis(ids, 0).AsType(mlx.DTypeFloat32)
+				mlx.Eval(got, want)
+				actual, expected := got.Floats(), want.Floats()
+				for i, v := range actual {
+					if v != expected[i] {
+						t.Fatalf("candidate %d: selected=%g full=%g", i, v, expected[i])
+					}
+				}
+			})
+		})
+	}
+}
diff --git a/mlxrunner/score_test.go b/mlxrunner/score_test.go
index 4abd68690..40986bb32 100644
--- a/mlxrunner/score_test.go
+++ b/mlxrunner/score_test.go
@@ -79,10 +79,12 @@ func TestScoreSharedPrefix(t *testing.T) {
 	}{
 		{"branch lengths and repeated restore", [][]int32{{1, 2, 3, 4}, {1, 2, 5}, {1, 2, 3, 6, 7}, {1, 2, 3, 4}}},
 		{"identical prompts", [][]int32{{1, 2, 3}, {1, 2, 3}}},
+		{"prompt is prefix", [][]int32{{1, 2}, {1, 2, 3, 4}}},
 		{"empty prefix", [][]int32{{1, 2}, {2, 1, 3}}},
 		{"one prompt", [][]int32{{1, 2, 3, 4}}},
 		{"one token", [][]int32{{1}, {1}, {2}}},
 		{"chunked prefix", [][]int32{append(slices.Repeat([]int32{1}, prefillChunkSize()+3), 2), append(slices.Repeat([]int32{1}, prefillChunkSize()+3), 3)}},
+		{"chunked suffix", [][]int32{append([]int32{1, 2}, slices.Repeat([]int32{3}, prefillChunkSize()+3)...), append([]int32{1, 2}, slices.Repeat([]int32{4}, prefillChunkSize()+3)...)}},
 	} {
 		mlxtest.RunSubtest(t, tt.name, func(t *mlxtest.T) {
 			m := &scoringTestModel{}
@@ -159,6 +161,10 @@ func TestScoreCancellation(t *testing.T) {
 					t.Fatal("cancelled request retained cache state")
 				}
 			}
+			m.cancel = nil
+			if _, err := r.scoreRows(context.Background(), rows, 2); err != nil {
+				t.Fatalf("request after cancellation: %v", err)
+			}
 		})
 	}
 }
@@ -167,10 +173,15 @@ func TestScoreValidation(t *testing.T) {
 	tok := newTestTokenizer(t, []int32{7})
 	r := &Runner{Tokenizer: tok, contextLength: 10}
 	for _, input := range []llm.ScoreRequest{
-		{}, {MaxTokens: 10}, {MaxTokens: 11, Rows: []llm.ScoreRow{{Prompt: "1", Candidates: []string{"2"}}}},
+		{},
+		{MaxTokens: 10},
+		{MaxTokens: 10, Rows: make([]llm.ScoreRow, 65)},
+		{Rows: []llm.ScoreRow{{Prompt: "1", Candidates: []string{"2"}}}},
+		{MaxTokens: 11, Rows: []llm.ScoreRow{{Prompt: "1", Candidates: []string{"2"}}}},
 		{MaxTokens: 1, Rows: []llm.ScoreRow{{Prompt: "12", Candidates: []string{"3"}}}},
 		{MaxTokens: 10, Rows: []llm.ScoreRow{{Prompt: "", Candidates: []string{"1"}}}},
 		{MaxTokens: 10, Rows: []llm.ScoreRow{{Prompt: "1"}}},
+		{MaxTokens: 10, Rows: []llm.ScoreRow{{Prompt: "1", Candidates: slices.Repeat([]string{"2"}, 27)}}},
 		{MaxTokens: 10, Rows: []llm.ScoreRow{{Prompt: "1", Candidates: []string{"23"}}}},
 		{MaxTokens: 10, Rows: []llm.ScoreRow{{Prompt: "1", Candidates: []string{"2", "2"}}}},
 	} {
@@ -183,10 +194,10 @@ func TestScoreValidation(t *testing.T) {
 }
 
 // Optional full-model check against independently prefilling each question.
-func TestNimbleModel(t *testing.T) {
-	name := os.Getenv("OLLAMA_NIMBLE_MODEL")
+func TestScoreModel(t *testing.T) {
+	name := os.Getenv("OLLAMA_TEST_MODEL")
 	if name == "" {
-		t.Skip("set OLLAMA_NIMBLE_MODEL to an imported Qwen3.5/Nimble model")
+		t.Skip("set OLLAMA_TEST_MODEL to an imported Nimble or Tev model")
 	}
 	var req decision.Request
 	if err := json.Unmarshal([]byte(`{
@@ -209,6 +220,11 @@ func TestNimbleModel(t *testing.T) {
 	}); err != nil {
 		t.Fatal(err)
 	}
+	allCandidates := llm.ScoreRow{Prompt: c.Request.Rows[0].Prompt}
+	for code := 'A'; code <= 'Z'; code++ {
+		allCandidates.Candidates = append(allCandidates.Candidates, string(code))
+	}
+	c.Request.Rows = append(c.Request.Rows, allCandidates)
 
 	mlxtest.Run(t, func(t *mlxtest.T) {
 		r := &Runner{}
@@ -221,7 +237,22 @@ func TestNimbleModel(t *testing.T) {
 		if err != nil {
 			t.Fatal(err)
 		}
+		if shared.OutputTokens != 0 {
+			t.Fatalf("scoring generated %d tokens", shared.OutputTokens)
+		}
+		var inputTokens int
+		for _, row := range c.Request.Rows {
+			inputTokens += len(r.Tokenizer.Encode(row.Prompt, false))
+		}
+		if shared.InputTokens != inputTokens {
+			t.Fatalf("input tokens = %d, want %d", shared.InputTokens, inputTokens)
+		}
 		probabilities := func(logits []float32) []float64 {
+			for i, x := range logits {
+				if math.IsNaN(float64(x)) || math.IsInf(float64(x), 0) {
+					t.Fatalf("candidate %d has non-finite logit %v", i, x)
+				}
+			}
 			p := make([]float64, len(logits))
 			peak := slices.Max(logits)
 			var sum float64
diff --git a/parser/parser.go b/parser/parser.go
index 23a571061..5ca018f56 100644
--- a/parser/parser.go
+++ b/parser/parser.go
@@ -24,6 +24,7 @@ import (
 	"golang.org/x/text/transform"
 
 	"github.com/ollama/ollama/api"
+	"github.com/ollama/ollama/types/model"
 )
 
 var ErrModelNotFound = errors.New("no Modelfile or safetensors files found")
@@ -132,6 +133,11 @@ func (f Modelfile) CreateRequest(relativeDir string) (*api.CreateRequest, error)
 			req.Renderer = c.Args
 		case "parser":
 			req.Parser = c.Args
+		case "capability":
+			if !model.Capability(c.Args).IsValid() {
+				return nil, fmt.Errorf("unknown capability: %q", c.Args)
+			}
+			req.Capabilities = append(req.Capabilities, c.Args)
 		case "requires":
 			// golang.org/x/mod/semver requires "v" prefix
 			requires := c.Args
@@ -437,7 +443,7 @@ func (c Command) String() string {
 	switch c.Name {
 	case "model":
 		fmt.Fprintf(&sb, "FROM %s", c.Args)
-	case "license", "template", "system", "adapter", "renderer", "parser", "requires", "draft":
+	case "license", "template", "system", "adapter", "renderer", "parser", "requires", "draft", "capability":
 		fmt.Fprintf(&sb, "%s %s", strings.ToUpper(c.Name), quote(c.Args))
 	case "message":
 		role, message, _ := strings.Cut(c.Args, ": ")
@@ -463,7 +469,7 @@ const (
 var (
 	errMissingFrom        = errors.New("no FROM line")
 	errInvalidMessageRole = errors.New("message role must be one of \"system\", \"user\", or \"assistant\"")
-	errInvalidCommand     = errors.New("command must be one of \"from\", \"license\", \"template\", \"system\", \"adapter\", \"draft\", \"renderer\", \"parser\", \"parameter\", \"message\", or \"requires\"")
+	errInvalidCommand     = errors.New("command must be one of \"from\", \"license\", \"template\", \"system\", \"adapter\", \"draft\", \"renderer\", \"parser\", \"parameter\", \"message\", \"requires\", or \"capability\"")
 )
 
 type ParserError struct {
@@ -723,7 +729,7 @@ func isValidMessageRole(role string) bool {
 
 func isValidCommand(cmd string) bool {
 	switch strings.ToLower(cmd) {
-	case "from", "license", "template", "system", "adapter", "draft", "renderer", "parser", "parameter", "message", "requires":
+	case "from", "license", "template", "system", "adapter", "draft", "renderer", "parser", "parameter", "message", "requires", "capability":
 		return true
 	default:
 		return false
diff --git a/parser/parser_test.go b/parser/parser_test.go
index f295063aa..0257c03c3 100644
--- a/parser/parser_test.go
+++ b/parser/parser_test.go
@@ -288,6 +288,44 @@ PARSER parser1
 	assert.Equal(t, []Command{{Name: "model", Args: "foo"}, {Name: "parser", Args: "parser1"}}, modelfile.Commands)
 }
 
+func TestModelfileCapabilities(t *testing.T) {
+	for _, input := range []string{
+		"FROM base\nCAPABILITY decision\nCAPABILITY tools\n",
+		"FROM base\ncapability decision\nCAPABILITY \"tools\"",
+	} {
+		mf, err := ParseFile(strings.NewReader(input))
+		if err != nil {
+			t.Fatal(err)
+		}
+		req, err := mf.CreateRequest(t.TempDir())
+		if err != nil {
+			t.Fatal(err)
+		}
+		if diff := cmp.Diff([]string{"decision", "tools"}, req.Capabilities); diff != "" {
+			t.Fatalf("capabilities (-want +got):\n%s", diff)
+		}
+		roundtrip, err := ParseFile(strings.NewReader(mf.String()))
+		if err != nil {
+			t.Fatal(err)
+		}
+		if diff := cmp.Diff(mf, roundtrip); diff != "" {
+			t.Fatalf("Modelfile roundtrip (-want +got):\n%s", diff)
+		}
+	}
+}
+
+func TestModelfileRejectsUnknownCapability(t *testing.T) {
+	for _, capability := range []string{"system-one", "decision tools", `""`} {
+		mf, err := ParseFile(strings.NewReader("FROM base\nCAPABILITY " + capability + "\n"))
+		if err != nil {
+			t.Fatal(err)
+		}
+		if _, err := mf.CreateRequest(t.TempDir()); err == nil || !strings.Contains(err.Error(), "unknown capability") {
+			t.Fatalf("capability %q: got %v, want unknown capability", capability, err)
+		}
+	}
+}
+
 func TestParseFileMessages(t *testing.T) {
 	cases := []struct {
 		input    string
diff --git a/server/capabilities_test.go b/server/capabilities_test.go
new file mode 100644
index 000000000..2d934334f
--- /dev/null
+++ b/server/capabilities_test.go
@@ -0,0 +1,90 @@
+package server
+
+import (
+	"net/http"
+	"path/filepath"
+	"slices"
+	"strings"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/ollama/ollama/api"
+	"github.com/ollama/ollama/parser"
+	"github.com/ollama/ollama/types/model"
+)
+
+func TestCreateCapabilities(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	for _, format := range []string{"gguf", "safetensors"} {
+		t.Run(format, func(t *testing.T) {
+			t.Setenv("OLLAMA_MODELS", t.TempDir())
+			var s Server
+			baseCaps := []string{"completion", "vision"}
+			if format == "safetensors" {
+				createSafetensorsTestModel(t, "base", model.ConfigV2{
+					ModelFormat: format, Renderer: "qwen3.5", Capabilities: baseCaps,
+				}, nil)
+			} else {
+				_, digest := createBinFile(t, map[string]any{"general.architecture": "qwen35"}, nil)
+				w := createRequest(t, s.CreateHandler, api.CreateRequest{
+					Model: "base", Files: map[string]string{"model.gguf": digest},
+					Capabilities: baseCaps, Stream: &stream,
+				})
+				if w.Code != http.StatusOK {
+					t.Fatalf("create base: %d %s", w.Code, w.Body)
+				}
+			}
+
+			modelfile := "FROM base\nCAPABILITY decision\nCAPABILITY completion\nCAPABILITY decision\n"
+			for _, name := range []string{"declared", "roundtrip", "inherited"} {
+				mf, err := parser.ParseFile(strings.NewReader(modelfile))
+				if err != nil {
+					t.Fatal(err)
+				}
+				req, err := mf.CreateRequest(t.TempDir())
+				if err != nil {
+					t.Fatal(err)
+				}
+				req.Model, req.Stream = name, &stream
+				// The CLI uploads local files under their base names.
+				files := make(map[string]string, len(req.Files))
+				for path, digest := range req.Files {
+					files[filepath.Base(path)] = digest
+				}
+				req.Files = files
+				w := createRequest(t, s.CreateHandler, req)
+				if w.Code != http.StatusOK {
+					t.Fatalf("create %s: %d %s", name, w.Code, w.Body)
+				}
+				cfg := readCreatedModelConfig(t, name)
+				if want := []string{"completion", "vision", "decision"}; !slices.Equal(cfg.Capabilities, want) {
+					t.Fatalf("%s capabilities = %v, want %v", name, cfg.Capabilities, want)
+				}
+				shown, err := GetModelInfo(api.ShowRequest{Model: name})
+				if err != nil {
+					t.Fatal(err)
+				}
+				if !slices.Contains(shown.Capabilities, model.CapabilityDecision) || !strings.Contains(shown.Modelfile, "CAPABILITY decision\n") {
+					t.Fatalf("show %s lost capability: %+v", name, shown)
+				}
+				modelfile = shown.Modelfile
+				if name == "roundtrip" {
+					modelfile = "FROM roundtrip\n"
+				}
+			}
+		})
+	}
+}
+
+func TestCreateRejectsUnknownCapability(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	var s Server
+	for _, capability := range []string{"", "system-one", "decision tools"} {
+		w := createRequest(t, s.CreateHandler, api.CreateRequest{
+			Model: "invalid", From: "missing", Capabilities: []string{capability}, Stream: &stream,
+		})
+		if w.Code != http.StatusBadRequest || !strings.Contains(w.Body.String(), "unknown capability") {
+			t.Fatalf("capability %q: %d %s", capability, w.Code, w.Body)
+		}
+	}
+}
diff --git a/server/create.go b/server/create.go
index 8f7d30b13..fd538c903 100644
--- a/server/create.go
+++ b/server/create.go
@@ -89,6 +89,12 @@ func (s *Server) CreateHandler(c *gin.Context) {
 	config.Renderer = r.Renderer
 	config.Parser = r.Parser
 	config.Requires = r.Requires
+	for _, capability := range r.Capabilities {
+		if !model.Capability(capability).IsValid() {
+			c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("unknown capability: %q", capability)})
+			return
+		}
+	}
 
 	if err := validateCreateFiles(r.Files); err != nil {
 		c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{"error": err.Error()})
@@ -298,6 +304,7 @@ func (s *Server) CreateHandler(c *gin.Context) {
 			send(gin.H{"error": err.Error(), "status": http.StatusBadRequest})
 			return
 		}
+		config.AddCapabilities(r.Capabilities...)
 
 		if err := createModel(reqCtx, r, name, baseLayers, config, fn); err != nil {
 			if errors.Is(err, create.ErrBadTemplate) || errors.Is(err, create.ErrInvalidRequires) || errors.Is(err, create.ErrInvalidLicense) || errors.Is(err, errInvalidSplitGGUF) {
@@ -414,6 +421,7 @@ func writeSafetensorsManifest(r api.CreateRequest, draftDir string, fn func(resp
 		License:             r.License,
 		Parameters:          r.Parameters,
 		Messages:            r.Messages,
+		Capabilities:        r.Capabilities,
 		BeforeWriteManifest: func() { fn(api.ProgressResponse{Status: "writing manifest"}) },
 	})
 	return func(ctx context.Context, modelName string, info create.ManifestInfo) error {
@@ -1064,7 +1072,7 @@ func validateCreateManifestListRequest(r api.CreateRequest) error {
 		return newManifestListRequestError("manifest list creation cannot be combined with model creation options")
 	case r.Template != "", r.System != "", r.License != nil, len(r.Parameters) > 0, len(r.Messages) > 0:
 		return newManifestListRequestError("manifest list creation cannot be combined with model creation options")
-	case r.Renderer != "", r.Parser != "", r.Requires != "", len(r.Info) > 0:
+	case r.Renderer != "", r.Parser != "", r.Requires != "", len(r.Info) > 0, len(r.Capabilities) > 0:
 		return newManifestListRequestError("manifest list creation cannot be combined with model creation options")
 	case r.Quantize != "", r.Quantization != "", r.DraftQuantize != "":
 		return newManifestListRequestError("manifest list creation cannot be combined with model creation options")
diff --git a/server/images.go b/server/images.go
index 1e6cf26d5..60c69347d 100644
--- a/server/images.go
+++ b/server/images.go
@@ -551,6 +551,7 @@ func (m *Model) CheckCapabilities(want ...model.Capability) error {
 		model.CapabilityEmbedding:  errCapabilityEmbedding,
 		model.CapabilityThinking:   errCapabilityThinking,
 		model.CapabilityImage:      errCapabilityImage,
+		model.CapabilityDecision:   errors.New("decision"),
 	}
 
 	for _, cap := range want {
@@ -636,6 +637,12 @@ func (m *Model) String() string {
 			Args: m.Config.Parser,
 		})
 	}
+	for _, capability := range m.Config.Capabilities {
+		modelfile.Commands = append(modelfile.Commands, parser.Command{
+			Name: "capability",
+			Args: capability,
+		})
+	}
 
 	for k, v := range m.Options {
 		switch v := v.(type) {
diff --git a/server/routes.go b/server/routes.go
index b2d71ce7c..829259303 100644
--- a/server/routes.go
+++ b/server/routes.go
@@ -929,11 +929,7 @@ func (s *Server) SystemOneHandler(c *gin.Context) {
 		handleScheduleError(c, req.Model, err)
 		return
 	}
-	if !m.isGGUF() || m.Config.Renderer != "qwen3.5" && !(m.Config.Renderer == "" && m.Config.ModelFamily == "qwen35") {
-		c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("model %q is not supported by System One; use a local Nimble or Tev GGUF model", req.Model)})
-		return
-	}
-	r, _, _, err := s.scheduleRunner(c.Request.Context(), name.String(), "", []model.Capability{model.CapabilityCompletion}, nil, req.KeepAlive, nil)
+	r, _, _, err := s.scheduleRunner(c.Request.Context(), name.String(), "", []model.Capability{model.CapabilityCompletion, model.CapabilityDecision}, nil, req.KeepAlive, nil)
 	if err != nil {
 		handleScheduleError(c, req.Model, err)
 		return
diff --git a/server/routes_create_test.go b/server/routes_create_test.go
index e83bb38df..60d54f527 100644
--- a/server/routes_create_test.go
+++ b/server/routes_create_test.go
@@ -1262,6 +1262,13 @@ func TestCreateManifestListRejectsInvalidRequests(t *testing.T) {
 			},
 			wantError: "cannot be combined",
 		},
+		{
+			name: "capabilities",
+			req: api.CreateRequest{
+				List: []string{"test-gguf", "test-safetensors"}, Capabilities: []string{"decision"},
+			},
+			wantError: "cannot be combined",
+		},
 	} {
 		t.Run(tt.name, func(t *testing.T) {
 			err := validateCreateManifestListRequest(tt.req)
@@ -2482,7 +2489,8 @@ func TestCreateSafetensorsRejectsMissingBlob(t *testing.T) {
 func TestWriteSafetensorsManifestPreservesRequestMetadata(t *testing.T) {
 	t.Setenv("OLLAMA_MODELS", t.TempDir())
 	r := api.CreateRequest{
-		Model: "uploaded-safetensors",
+		Model:        "uploaded-safetensors",
+		Capabilities: []string{"decision", "completion", "decision"},
 		Info: map[string]any{
 			"capabilities": []string{"completion", "thinking"},
 		},
@@ -2519,8 +2527,8 @@ func TestWriteSafetensorsManifestPreservesRequestMetadata(t *testing.T) {
 	if cfg.Requires != "0.20.0" {
 		t.Fatalf("Requires = %q, want 0.20.0", cfg.Requires)
 	}
-	if !slices.Contains(cfg.Capabilities, "completion") || !slices.Contains(cfg.Capabilities, "thinking") {
-		t.Fatalf("Capabilities = %v, want completion and thinking", cfg.Capabilities)
+	if want := []string{"completion", "thinking", "decision"}; !slices.Equal(cfg.Capabilities, want) {
+		t.Fatalf("Capabilities = %v, want %v", cfg.Capabilities, want)
 	}
 
 	mf, err := manifest.ParseNamedManifest(model.ParseName("uploaded-safetensors"))
diff --git a/server/systemone_test.go b/server/systemone_test.go
index 0bede8e56..348204992 100644
--- a/server/systemone_test.go
+++ b/server/systemone_test.go
@@ -37,27 +37,38 @@ func (r *systemOneTestRunner) Score(ctx context.Context, input llm.ScoreRequest)
 func TestSystemOneHandler(t *testing.T) {
 	gin.SetMode(gin.TestMode)
 	t.Setenv("OLLAMA_MODELS", t.TempDir())
-	config := model.ConfigV2{ModelFormat: "safetensors", Renderer: "qwen3.5", Capabilities: []string{"completion"}}
-	createSafetensorsTestModel(t, "safetensors-decision", config, nil)
+	config := model.ConfigV2{ModelFormat: "safetensors", Renderer: "qwen3.5", Capabilities: []string{"completion", "decision"}}
+	params, err := manifest.NewLayer(strings.NewReader(`{"num_ctx":8192}`), "application/vnd.ollama.image.params")
+	if err != nil {
+		t.Fatal(err)
+	}
+	createSafetensorsTestModel(t, "safetensors-decision", config, []manifest.Layer{params})
+	config.Capabilities = []string{"completion"}
+	createSafetensorsTestModel(t, "safetensors-undeclared", config, nil)
 	for _, modelConfig := range []struct {
 		name, architecture, renderer, system, template string
 		contextLength                                  int
+		undeclared                                     bool
 	}{
-		{"decision-test", "qwen35", "qwen3.5", "Model-specific scoring instructions.", "", 1024},
-		{"gguf-decision", "qwen35", "", "Native model scoring instructions.", "", 4096},
-		{"go-template", "qwen35", "", "Model-specific scoring instructions.", "custom:{{ range .Messages }}{{ .Role }}:{{ .Content }}\n{{ end }}answer:", 1024},
-		{"no-system", "qwen35", "qwen3.5", "", "", 1024},
-		{"gguf-wrong-architecture", "llama", "", "", "", 1024},
-		{"gguf-wrong-renderer", "qwen35", "gemma4", "", "", 1024},
+		{"decision-test", "qwen35", "qwen3.5", "Model-specific scoring instructions.", "", 1024, false},
+		{"gguf-decision", "qwen35", "", "Native model scoring instructions.", "", 4096, false},
+		{"go-template", "qwen35", "", "Model-specific scoring instructions.", "custom:{{ range .Messages }}{{ .Role }}:{{ .Content }}\n{{ end }}answer:", 1024, false},
+		{"no-system", "qwen35", "qwen3.5", "", "", 1024, false},
+		{"gguf-undeclared", "qwen35", "qwen3.5", "", "", 1024, true},
+		{"gguf-other-architecture", "llama", "", "Model-specific scoring instructions.", "custom:{{ range .Messages }}{{ .Role }}:{{ .Content }}\n{{ end }}answer:", 1024, false},
 	} {
 		kv := gguftest.KV{"general.architecture": modelConfig.architecture}
 		if modelConfig.template == "" {
 			kv["tokenizer.chat_template"] = "{{ messages }}"
 		}
 		_, digest := createBinFile(t, kv, nil)
+		caps := []string{"completion", "decision"}
+		if modelConfig.undeclared {
+			caps = []string{"completion"}
+		}
 		configLayer, err := createConfigLayer(model.ConfigV2{
 			ModelFormat: "gguf", ModelFamily: modelConfig.architecture,
-			Renderer: modelConfig.renderer, Capabilities: []string{"completion"},
+			Renderer: modelConfig.renderer, Capabilities: caps,
 		})
 		if err != nil {
 			t.Fatal(err)
@@ -101,15 +112,16 @@ func TestSystemOneHandler(t *testing.T) {
 		{"Modelfile template", `{"model":"go-template","state":"refund please","questions":{"refund":{"type":"noul","instructions":"Refund requested?"}}}`, nil, 200, 1, false},
 		{"no system prompt", `{"model":"no-system","state":"refund please","questions":{"refund":{"type":"noul","instructions":"Refund requested?"}}}`, nil, 200, 1, false},
 		{"template failure", `{"model":"gguf-decision","state":"refund please","questions":{"refund":{"type":"noul","instructions":"Refund requested?"}}}`, errors.New("invalid model template"), 500, 0, false},
-		{"GGUF incompatible architecture", `{"model":"gguf-wrong-architecture","state":"x","questions":{"x":{"type":"noul","instructions":"q"}}}`, nil, 400, 0, false},
-		{"GGUF conflicting renderer", `{"model":"gguf-wrong-renderer","state":"x","questions":{"x":{"type":"noul","instructions":"q"}}}`, nil, 400, 0, false},
+		{"GGUF capability without Qwen architecture", `{"model":"gguf-other-architecture","state":"x","questions":{"refund":{"type":"noul","instructions":"q"}}}`, nil, 200, 1, false},
+		{"GGUF missing capability", `{"model":"gguf-undeclared","state":"x","questions":{"x":{"type":"noul","instructions":"q"}}}`, nil, 400, 0, false},
 		{"runner validation", `{"model":"decision-test","state":"x","questions":{"x":{"type":"noul","instructions":"q"}}}`, api.StatusError{StatusCode: 400, ErrorMessage: "prompt too long"}, 400, 1, false},
 		{"runner failure", `{"model":"decision-test","state":"x","questions":{"x":{"type":"noul","instructions":"q"}}}`, errors.New("runner failed"), 500, 1, false},
 		{"runtime OOM", `{"model":"decision-test","state":"x","questions":{"x":{"type":"noul","instructions":"q"}}}`, errors.New("out of memory"), 500, 1, true},
 		{"invalid schema", `{"model":"decision-test","state":"x","questions":{}}`, nil, 400, 0, false},
 		{"missing model", `{"model":"missing","state":"x","questions":{"x":{"type":"noul","instructions":"q"}}}`, nil, 404, 0, false},
 		{"cloud", `{"model":"decision:cloud","state":"x","questions":{"x":{"type":"noul","instructions":"q"}}}`, nil, 400, 0, false},
-		{"safetensors unsupported", `{"model":"safetensors-decision","state":"x","questions":{"x":{"type":"noul","instructions":"q"}}}`, nil, 400, 0, false},
+		{"safetensors success", `{"model":"safetensors-decision","state":"x","questions":{"refund":{"type":"noul","instructions":"q"}}}`, nil, 200, 1, false},
+		{"safetensors missing capability", `{"model":"safetensors-undeclared","state":"x","questions":{"x":{"type":"noul","instructions":"q"}}}`, nil, 400, 0, false},
 		{"bad JSON", `{`, nil, 400, 0, false},
 		{"at body limit", prefix + strings.Repeat("x", stateLimit) + suffix, nil, 200, 1, false},
 		{"over body limit", prefix + strings.Repeat("x", stateLimit+1) + suffix, nil, 413, 0, false},
@@ -177,6 +189,9 @@ func TestSystemOneHandler(t *testing.T) {
 				}
 				prompt := runner.request.Rows[0].Prompt
 				wantContext := 1024
+				if !ref.model.isGGUF() {
+					wantContext = 8192
+				}
 				if ref.model.HasGoTemplate {
 					if !strings.HasPrefix(prompt, "custom:system:Model-specific scoring instructions.\nuser:") || !strings.HasSuffix(prompt, "answer:") {
 						t.Fatalf("scorer did not receive the Modelfile template output: %q", prompt)
diff --git a/types/model/capability.go b/types/model/capability.go
index 4cf628c09..be6f0795b 100644
--- a/types/model/capability.go
+++ b/types/model/capability.go
@@ -11,8 +11,19 @@ const (
 	CapabilityThinking   = Capability("thinking")
 	CapabilityImage      = Capability("image")
 	CapabilityAudio      = Capability("audio")
+	CapabilityDecision   = Capability("decision")
 )
 
+func (c Capability) IsValid() bool {
+	switch c {
+	case CapabilityCompletion, CapabilityTools, CapabilityInsert, CapabilityVision,
+		CapabilityEmbedding, CapabilityThinking, CapabilityImage, CapabilityAudio, CapabilityDecision:
+		return true
+	default:
+		return false
+	}
+}
+
 func (c Capability) String() string {
 	return string(c)
 }
diff --git a/types/model/config.go b/types/model/config.go
index 3912b9862..3aa6bbe47 100644
--- a/types/model/config.go
+++ b/types/model/config.go
@@ -1,5 +1,7 @@
 package model
 
+import "slices"
+
 // ConfigV2 represents the configuration metadata for a model.
 type ConfigV2 struct {
 	ModelFormat   string   `json:"model_format"`
@@ -17,7 +19,6 @@ type ConfigV2 struct {
 	RemoteHost  string `json:"remote_host,omitempty"`
 	RemoteModel string `json:"remote_model,omitempty"`
 
-	// used for remotes
 	Capabilities []string `json:"capabilities,omitempty"`
 	ContextLen   int      `json:"context_length,omitempty"`
 	EmbedLen     int      `json:"embedding_length,omitempty"`
@@ -25,6 +26,15 @@ type ConfigV2 struct {
 	Draft        *Draft   `json:"draft,omitempty"`
 }
 
+// AddCapabilities preserves inherited and inferred capabilities.
+func (c *ConfigV2) AddCapabilities(capabilities ...string) {
+	for _, capability := range capabilities {
+		if !slices.Contains(c.Capabilities, capability) {
+			c.Capabilities = append(c.Capabilities, capability)
+		}
+	}
+}
+
 // Draft describes an auxiliary draft model stored in the same manifest.
 type Draft struct {
 	ModelFormat  string `json:"model_format,omitempty"`