| 1 | package anthropic |
| 2 | |
| 3 | import ( |
| 4 | "encoding/json" |
| 5 | |
| 6 | "reasonix/internal/provider" |
| 7 | ) |
| 8 | |
| 9 | func (c *client) replayMessages(messages []provider.Message) []provider.Message { |
| 10 | messages, _ = provider.ProjectReplaySafeMessages(c, messages) |
| 11 | return messages |
| 12 | } |
| 13 | |
| 14 | func (c *client) replayReasoningBlock(m provider.Message) (contentBlock, bool) { |
| 15 | // DeepSeek's thinking mode requires every historical assistant turn's |
| 16 | // thinking block to be passed back whenever the request declares tools — |
| 17 | // including plain question-answer turns with no tool activity. |
| 18 | if c.deepseek && m.ReasoningContent != "" { |
| 19 | return contentBlock{Type: "thinking", Thinking: m.ReasoningContent}, true |
| 20 | } |
| 21 | if !c.deepseek && c.replaysReceivedThinking() && m.ReasoningSignature != "" { |
| 22 | return contentBlock{Type: "thinking", Thinking: m.ReasoningContent, Signature: m.ReasoningSignature}, true |
| 23 | } |
| 24 | if !c.nativeAnthropic && !c.deepseek && c.replaysReceivedThinking() && m.ReasoningContent != "" { |
| 25 | return contentBlock{Type: "thinking", Thinking: m.ReasoningContent}, true |
| 26 | } |
| 27 | return contentBlock{}, false |
| 28 | } |
| 29 | |
| 30 | // mergeThinkingFirst merges appended blocks into an existing same-role |
| 31 | // message's content. A thinking block must lead its message, so a leading |
| 32 | // thinking run in the appended blocks moves to the front: after projection |
| 33 | // degrades a reasoning-less turn to plain text, a following healthy assistant |
| 34 | // turn merging into it must stay [thinking, text, ...], never [text, ...]. |
| 35 | func mergeThinkingFirst(existing, blocks []contentBlock) []contentBlock { |
| 36 | head := leadingThinkingBlocks(blocks) |
| 37 | if head == 0 || len(existing) == 0 { |
| 38 | return append(existing, blocks...) |
| 39 | } |
| 40 | merged := make([]contentBlock, 0, len(existing)+len(blocks)) |
| 41 | merged = append(merged, blocks[:head]...) |
| 42 | merged = append(merged, existing...) |
| 43 | merged = append(merged, blocks[head:]...) |
| 44 | return merged |
| 45 | } |
| 46 | |
| 47 | // leadingThinkingBlocks counts the signed or redacted blocks at the head. |
| 48 | func leadingThinkingBlocks(blocks []contentBlock) int { |
| 49 | head := 0 |
| 50 | for head < len(blocks) && (blocks[head].Type == "thinking" || blocks[head].Type == "redacted_thinking") { |
| 51 | head++ |
| 52 | } |
| 53 | return head |
| 54 | } |
| 55 | |
| 56 | func (c *client) applyDeepSeekThinking(r *anthRequest, req provider.Request) { |
| 57 | r.Temperature = req.Temperature |
| 58 | t := c.thinking |
| 59 | if t != "disabled" { |
| 60 | t = "enabled" |
| 61 | } |
| 62 | if c.effort == "disabled" { |
| 63 | t = "disabled" |
| 64 | } |
| 65 | effort := c.effort |
| 66 | if req.EffortOverride != "" { |
| 67 | effort = req.EffortOverride |
| 68 | if effort == "disabled" { |
| 69 | t = "disabled" |
| 70 | } else if c.thinking != "disabled" { |
| 71 | t = "enabled" |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | r.Thinking = &thinkingConfig{Type: t} |
| 76 | if t == "disabled" { |
| 77 | return |
| 78 | } |
| 79 | if effort != "" { |
| 80 | r.OutputConfig = &outputConfig{Effort: effort} |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | func (c *client) ReasoningReplayCapabilities() provider.ReasoningReplayCapabilities { |
| 85 | if c.deepseek { |
| 86 | return provider.ReasoningReplayCapabilities{Format: "anthropic-thinking"} |
| 87 | } |
| 88 | return provider.ReasoningReplayCapabilities{Format: "anthropic-thinking", RequireSignature: c.nativeAnthropic} |
| 89 | } |
| 90 | |
| 91 | func (c *client) replayReasoningBlocks(m provider.Message) []contentBlock { |
| 92 | if !c.deepseek && c.replaysReceivedThinking() && len(m.ThinkingBlocks) > 0 { |
| 93 | blocks := make([]contentBlock, 0, len(m.ThinkingBlocks)) |
| 94 | for _, b := range m.ThinkingBlocks { |
| 95 | blocks = append(blocks, contentBlock{Type: b.Type, Thinking: b.Thinking, Signature: b.Signature, Data: b.Data}) |
| 96 | } |
| 97 | return blocks |
| 98 | } |
| 99 | if block, ok := c.replayReasoningBlock(m); ok { |
| 100 | return []contentBlock{block} |
| 101 | } |
| 102 | return nil |
| 103 | } |
| 104 | |
| 105 | func (b contentBlock) MarshalJSON() ([]byte, error) { |
| 106 | type plain contentBlock |
| 107 | if b.Type == "thinking" && b.Thinking == "" { |
| 108 | return json.Marshal(struct { |
| 109 | plain |
| 110 | Thinking string `json:"thinking"` |
| 111 | }{plain(b), b.Thinking}) |
| 112 | } |
| 113 | return json.Marshal(plain(b)) |
| 114 | } |
| 115 | |
| 116 | func thinkingSignature(b *provider.ThinkingBlock, delta string) string { |
| 117 | if b != nil { |
| 118 | return b.Signature |
| 119 | } |
| 120 | return delta |
| 121 | } |
| 122 | |
| 123 | func (c *client) replaysSignedThinking() bool { |
| 124 | return c.thinking == "adaptive" || (c.nativeAnthropic && c.thinking == "enabled") |
| 125 | } |
| 126 | |
| 127 | func (c *client) replaysReceivedThinking() bool { |
| 128 | return c.replaysSignedThinking() || (!c.nativeAnthropic && c.thinking == "enabled" && c.effort != "disabled") |
| 129 | } |
| 130 |