git.giacomolli.uk - onechat/blob - probe.go

   1 package main
   2
   3 import (
   4         "bufio"
   5         "context"
   6         "encoding/json"
   7         "errors"
   8         "fmt"
   9         "io"
  10         "log/slog"
  11         "os"
  12         "path/filepath"
  13         "strconv"
  14         "time"
  15 )
  16
  17 const (
  18         // probeName is the agent name of a probe run. The cache key comes from
  19         // it.
  20         probeName = "Probe"
  21
  22         // probeCallLimit is the most model calls of a probe run.
  23         probeCallLimit = 660
  24 )
  25
  26 // probe runs "onechat probe LOG COUNT [BUILDS]". It appends the first COUNT
  27 // messages of LOG, one JSON object {kind, text} per line, to a new chat in
  28 // probe/ in the data directory, and builds its tree with the real compactor.
  29 // Before each user message it waits for the builds, as a turn does. It stops at
  30 // the first failed call, after probeCallLimit calls, or when the used percent
  31 // of a quota window grows by more than buildQuotaLimit points. At the end it
  32 // reports the calls, the time per call, the calls at once, the cached share,
  33 // the quota, the retries, and the line sizes. BUILDS, from 1 to buildMax,
  34 // limits the builds that call the model at once in this run only. The core
  35 // still queues up to buildMax builds. The run holds the lock of the token file,
  36 // so it does not run while the daemon runs.
  37 func probe(ctx context.Context, args []string, out io.Writer) (err error) {
  38         if len(args) != 2 && len(args) != 3 {
  39                 return errors.New("usage: onechat probe LOG COUNT [BUILDS]")
  40         }
  41
  42         count, err := strconv.Atoi(args[1])
  43         if err != nil {
  44                 return fmt.Errorf("parse probe count: %w", err)
  45         }
  46
  47         if count <= 0 {
  48                 return fmt.Errorf("COUNT %q is not a positive number", args[1])
  49         }
  50
  51         builds := buildMax
  52         if len(args) == 3 {
  53                 builds, err = strconv.Atoi(args[2])
  54                 if err != nil {
  55                         return fmt.Errorf("parse probe builds: %w", err)
  56                 }
  57
  58                 if builds < 1 || builds > buildMax {
  59                         return fmt.Errorf("BUILDS %q is not a number from 1 to %d", args[2], buildMax)
  60                 }
  61         }
  62
  63         entries, err := probeReadLog(args[0], count)
  64         if err != nil {
  65                 return fmt.Errorf("read probe input: %w", err)
  66         }
  67
  68         dir, err := dataDir()
  69         if err != nil {
  70                 return fmt.Errorf("find probe data directory: %w", err)
  71         }
  72
  73         config, err := loadConfig(dir)
  74         if err != nil {
  75                 return fmt.Errorf("load probe configuration: %w", err)
  76         }
  77
  78         tokens, err := lockTokens(dir)
  79         if err != nil {
  80                 return fmt.Errorf("lock probe tokens: %w", err)
  81         }
  82
  83         defer func() {
  84                 closeErr := tokens.Close()
  85                 if closeErr != nil {
  86                         err = errors.Join(err, fmt.Errorf("close probe token lock: %w", closeErr))
  87                 }
  88         }()
  89
  90         address, auth, err := modelEndpoint(config, dir)
  91         if err != nil {
  92                 return fmt.Errorf("select probe endpoint: %w", err)
  93         }
  94
  95         root := filepath.Join(dir, "probe", time.Now().Format("20060102-150405"))
  96         err = os.MkdirAll(root, 0o700)
  97         if err != nil {
  98                 return fmt.Errorf("create probe directory: %w", err)
  99         }
 100
 101         usagePath := filepath.Join(root, "usage.jsonl")
 102         client := newModelClient(address, auth, "onechat-"+probeName, usagePath)
 103         client.LimitCalls(probeCallLimit)
 104
 105         summarizer := ProbeSlotSummarizer{
 106                 inner: newCompactor(client, probePrompt, config.Compactor, promptTools(), &ImageStore{dir: filepath.Join(dir, imageDirName)}),
 107                 slots: make(chan struct{}, builds),
 108         }
 109
 110         // The report of the probe counts the failed calls, so the lines of the
 111         // failed builds are not needed.
 112         memory, err := openMemory(ctx, root, time.Now, summarizer, slog.New(slog.DiscardHandler))
 113         if err != nil {
 114                 return fmt.Errorf("open probe memory: %w", err)
 115         }
 116
 117         _, err = fmt.Fprintf(out, "probe: %d messages into %s with %s at %s effort, %d builds at once\n", len(entries), root, config.Compactor.Model, config.Compactor.Effort, builds)
 118         if err != nil {
 119                 return fmt.Errorf("write probe header: %w", errors.Join(err, memory.Close()))
 120         }
 121
 122         run := BuildRun{
 123                 memory:    memory,
 124                 client:    client,
 125                 usagePath: usagePath,
 126         }
 127
 128         appended, stop := run.Run(ctx, entries)
 129         sizes, err := memory.buildModelLines()
 130         err = errors.Join(err, memory.Close())
 131         if err != nil {
 132                 return fmt.Errorf("finish probe memory: %w", err)
 133         }
 134
 135         records, err := buildReadUsage(usagePath)
 136         if err != nil {
 137                 return fmt.Errorf("read probe usage: %w", err)
 138         }
 139
 140         err = buildWriteReport(out, appended, stop, records, sizes)
 141         if err != nil {
 142                 return fmt.Errorf("write probe report: %w", err)
 143         }
 144
 145         return nil
 146 }
 147
 148 // ProbeSlotSummarizer lets at most cap(slots) builds call inner at once. A
 149 // build past the limit waits for a slot.
 150 type ProbeSlotSummarizer struct {
 151         inner Summarizer
 152         slots chan struct{}
 153 }
 154
 155 // Summarize waits for a slot and builds the node with inner.
 156 func (s ProbeSlotSummarizer) Summarize(ctx context.Context, task Task) (string, error) {
 157         select {
 158         case s.slots <- struct{}{}:
 159         case <-ctx.Done():
 160                 return "", ctx.Err()
 161         }
 162
 163         defer func() {
 164                 <-s.slots
 165         }()
 166
 167         return s.inner.Summarize(ctx, task)
 168 }
 169
 170 // probeReadLog reads the first count messages of the probe log at path. Source
 171 // dates are ignored because a probe uses its own clock.
 172 func probeReadLog(path string, count int) (entries []DatedMessage, err error) {
 173         file, err := os.Open(path)
 174         if err != nil {
 175                 return nil, fmt.Errorf("open probe log: %w", err)
 176         }
 177
 178         defer func() {
 179                 closeErr := file.Close()
 180                 if closeErr != nil {
 181                         err = errors.Join(err, fmt.Errorf("close probe log: %w", closeErr))
 182                 }
 183         }()
 184
 185         scanner := bufio.NewScanner(file)
 186         scanner.Buffer(make([]byte, 64*1024), buildLineBytes)
 187
 188         for len(entries) < count && scanner.Scan() {
 189                 var entry DatedMessage
 190
 191                 err = json.Unmarshal(scanner.Bytes(), &entry)
 192                 if err != nil {
 193                         return nil, fmt.Errorf("probe log line %d: %w", len(entries)+1, err)
 194                 }
 195
 196                 entry.Date = ""
 197                 entries = append(entries, entry)
 198         }
 199
 200         err = scanner.Err()
 201         if err != nil {
 202                 return nil, fmt.Errorf("read probe log: %w", err)
 203         }
 204
 205         if len(entries) < count {
 206                 return nil, fmt.Errorf("probe log has %d messages, fewer than %d", len(entries), count)
 207         }
 208
 209         return entries, nil
 210 }
 211
 212 // probePrompt returns the system prompt of a probe run: the prompt of the agent
 213 // probeName, without instructions and with a fixed instructions file path.
 214 func probePrompt() (string, error) {
 215         return prompt(probeName, "/PROBE/instructions.md", ""), nil
 216 }